Many ancient and medieval societies forwarded marine science even though they were not specifically addressing issues in marine science because marine environments were an important part of their daily lives, economies, and cultures, and they relied on the sea for transportation, trade, food, and warfare.
Marine science is a multidisciplinary field that studies the oceans and marine life, and includes disciplines such as oceanography, marine biology, and marine geology. While modern marine science is a relatively recent field, many ancient and medieval societies had a deep knowledge and understanding of marine environments, based on their experiences and interactions with the sea.
For example, ancient civilizations such as the Phoenicians, Greeks, and Romans were skilled seafarers, traders, and fishermen, and developed advanced shipbuilding, navigation, and fishing techniques. They also had knowledge of marine flora and fauna, and used them for medicinal, culinary, and ritual purposes. Similarly, medieval societies such as the Vikings, Arabs, and Chinese explored and traded across the seas, and contributed to the development of cartography, astronomy, and mathematics.
Therefore, even though they were not specifically addressing issues in marine science, these societies made significant contributions to our understanding of the sea and its importance for human societies.
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Read the questions CAREFULLY
The source to sink active transport by plants includes:
Leaves (source) ---> Roots (sink)Leaves (source) ---> Fruits (sink)What is active transport?Active transport is the movement or transport of molecules by living organisms against their concentration with the expenditure of energy in the form of ATP.
Active transport is used to transport organic compounds into sieve tubes. This process involves transporting organic compounds such as sugars from the source cell into the companion cell, and then from the companion cell into the sieve tube.
A simplified model of this process is as follows:
Source cell → Companion cell → Sieve tube
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Asiatic Cheetahs currently live in a much smaller areas than they once did because of human mpact. Scientist estimate that the total Asiatic Cheetah population is only about 100 adults.
Vhich of the following best predicts the result of having a small and isolated Asiatic Cheetah population?
Answer:
Explanation:
A small and isolated Asiatic Cheetah population is likely to face several challenges, including:
Genetic inbreeding: With a limited number of individuals in the population, there is a higher chance of genetic inbreeding. This can lead to reduced genetic diversity and an increased risk of genetic defects and diseases.
Limited gene flow: When a population is isolated, there is limited gene flow between different groups of animals. This can lead to reduced genetic diversity and increased inbreeding.
Vulnerability to environmental and human pressures: A small population is more vulnerable to environmental pressures such as climate change, natural disasters, and human impacts like habitat loss, poaching, and hunting. With a limited number of individuals, the loss of even a few individuals can have a significant impact on the population.
Reduced adaptability: With a limited number of individuals and limited genetic diversity, the population may be less able to adapt to changing environmental conditions or to cope with new threats.
Therefore, the best prediction of a small and isolated Asiatic Cheetah population is that it is at risk of declining further and may eventually face extinction if adequate conservation measures are not taken to protect and expand their habitat, prevent poaching and hunting, and promote genetic diversity through breeding programs.
Consider logistic model, = () = (1 − ) . Find the equilibrium points and the linearization about each for the logistic model. Hence determine the stability of each of these equilibrium points.
There are two points of equilibrium: N = 0 and N = K.
It is stable at the equilibrium point N = K and N = 0 is unstable.
How to determine equilibrium points?The logistic model is given by:
dN/dt = rN(1 - N/K)
where N = population size, t = time, r = intrinsic growth rate, and K = carrying capacity.
To find the equilibrium points, we set dN/dt = 0 and solve for N:
rN(1 - N/K) = 0
This equation has two solutions: N = 0 and N = K. Therefore, the equilibrium points are N = 0 and N = K.
To find the linearization about N = 0, take the derivative of dN/dt with respect to N and evaluate it at N = 0:
f(N) = rN(1 - N/K)
df/dN = r(1 - 2N/K)
df/dN|N=0 = r
The linearization about N = 0 is therefore:
dN/dt = rN
This is a simple exponential growth model, and the equilibrium point N = 0 is unstable.
To find the linearization about N = K, take the derivative of dN/dt with respect to N and evaluate it at N = K:
f(N) = rN(1 - N/K)
df/dN = r(1 - 2N/K)
f/dN|N=K = -r
The linearization about N = K is therefore:
dN/dt = rN(K - N)/K
This is a simple logistic growth model, and the equilibrium point N = K is stable.
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What are the environmental and societal benefits of cultured meat production compared to traditional meat production?
Answer:
Cultivated meat water usage can be reduced by 82%-96% depending on the product. Cultured meat production uses considerably fewer water resources compared to conventional meat production. Research has shown that agriculture is responsible for 92% of our water usage, and that.
Explanation:
Please help me with this
"Write a background information about fresh water fish pond" (include citation)
When constructing a freshwater fish pond, several factors must be taken into consideration, including the size and shape of the pond, water quality, and the type of fish species to be raised.
What are the features of a freshwater fish pond?A freshwater fish pond is a man-made body of water that is designed to raise and grow freshwater fish species for commercial or recreational purposes.
These ponds can range in size from small backyard ponds to large commercial operations spanning several acres.
One of the benefits of freshwater fish ponds is their ability to provide a consistent supply of fresh, high-quality fish for consumption. Additionally, these ponds can be used for recreational purposes such as fishing or as an aesthetic addition to a property.
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8. The following is an example of what type of mutation?
DNA
ATG
mRNA
UAC
tyrosine (normal protein)
normal
a. An inversion mutation
b. A translocation mutation
c. A point mutation
d. A duplicate mutation
The given mutation is an example of a point mutation.
The correct option is C.
What is a point mutation?A point mutation is a type of genetic mutation that involves a change in a single nucleotide base within DNA.
This type of mutation can occur during DNA replication or due to environmental factors, such as exposure to radiation or certain chemicals.
Point mutations can have a variety of effects on the resulting protein that is produced from the altered DNA sequence. Some point mutations may have no effect on the protein, while others can lead to the production of a non-functional protein or a protein with altered function. Depending on the location and nature of the mutation, it may have no effect on the organism, be harmful, or even beneficial.
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which set of terms best describes a cell membrane
The cell membrane can be described using the following terms:
1-Phospholipid bilayer: The cell membrane is composed of a double layer of phospholipid molecules arranged with their hydrophilic (water-loving) heads facing outward and their hydrophobic (water-repelling) tails facing inward.
2-Selectively permeable: The cell membrane is selectively permeable, meaning it allows the passage of certain substances while restricting the movement of others. This property helps maintain the cell's internal environment and regulate the exchange of molecules with the external environment.
3-Fluid mosaic model: The cell membrane is described by the fluid mosaic model, which suggests that it is a dynamic structure composed of various components, including phospholipids, proteins, carbohydrates, and cholesterol. These components are not fixed in place but rather move and interact within the membrane.
4-Barrier: The cell membrane acts as a barrier, separating the cell's internal environment from the external environment. It helps protect the cell's contents and regulates the movement of molecules, ions, and other substances in and out of the cell.
5-Receptor sites: The cell membrane contains receptor sites that can recognize and bind to specific molecules or signals, such as hormones or neurotransmitters. This allows the cell to respond to external stimuli and initiate various cellular processes.
4. If an atom has five protons, how do you know that it has five electrons as well?
Answer:
Atoms are neutral in electrical charge because they have the same number of negative electrons as positive protons (Table 4.5. 1). Therefore, the atomic number of an atom also tells you how many electrons the atom has.
Explanation:
bonding involves the valence shell electrons only, it is only necessary to illustrate those outer electrons.
Element
Group #
# of valence e-
Lewis dot structures
Calcium
Carbon
Fluorine
Oxygen
Neon
Hydrogen
Aluminum
Explanation:
porque los niños no van a las escuelas
When body temp increases it causes
metabolic reactions to increase, which
releases heat that further increases body
temp. This is an example of
a. Homeostasis
b. Positive feedback
c. Negative feedback
d. All of the above
When body temp increases it causes metabolic reactions to increase, which releases heat that further increases body temp. This is an example of positive feedback.
Positive feedback is a process in which a change in a system leads to an amplified or increased response in the same direction as the initial change, rather than stabilizing the system as negative feedback does. In positive feedback, the output enhances or reinforces the original stimulus, leading to a cascading effect of the process, which can be beneficial or detrimental to the system depending on the context.
Positive feedback loops can be found in various biological processes, such as blood clotting, childbirth, and action potentials in neurons, and can also be observed in non-biological systems, such as climate change and population growth.
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Write two sentences to describe one similarity and one difference between personal and national budgets
(here's the passage if needed. i know its not much)
What is an example of another pattern in nature that is caused by the
position of objects in the solar system?
A The petals of a flower
B Zebra stripes
C Day and night
D A bee's honeycomb
An example of another pattern in nature that is caused by the position of objects in the solar system is (d) A bee's honeycomb
Explaning another example of the patternFrom the question, we have the pattern to be:
Object's position in the solar systemA pattern in natureBy definition, the objects in the solar system are located in their relative location to the sun and also have impacts on the other bodies in the solar system.
The example of pattern that fits this scenario from the list of options is the (d) bee's honeycomb
This is because the bee uses the direction and angle of the sun to steer and also keep in touch with each other
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Which is the most common theme among several of the theories O water O volcanic energy O electrical energy Ospace
The most common theme among several of the theories listed is energy. Volcanic energy and electrical energy are both forms of energy, while water and space are not forms of energy but can be associated with energy in various ways. Hence options B and C are correct.
For example, water is often used to generate hydroelectric power, which is a form of energy. Space, on the other hand, is often studied in the context of astrophysics and the study of energy in the universe, such as dark matter and dark energy.
Therefore, while all of the options listed may be important and relevant in different fields of study, energy is a common theme that ties together several theories across different disciplines.
Hence options B and C are correct.
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15. Two Siamese and three Persian cats survive a shipwreck and are carried on driftwood to a previously uninhabited tropical island. All five cats have normal ears, but one carries the recessive allele for folded ears (his genotype is Ff). Calculate the frequencies of alleles F and f in the cat population of this island. If you assume Hardy-Weinberg equilibrium for these alleles (admittedly very improbable), about how many cats would you expect to have folded ears when the island population reaches 16,000?
what type of skeletons do jellyfish have
Answer: they have a hydrostatic skeleton- their bodies are supported by hydrostatic pressure from a fluid-filled cavity surrounded by muscles. Technically they have no actual skeleton.
Explanation:
Which of the following is a benefit of direct air capture technology?
O Moves carbon into the
atmosphere
O Provide carbon dioxide to crops in greenhouses
O Releasing carbon dioxide over the ozone layer
OUsing new fossil fuels for energy
The benefit of direct air capture technology is the ability to remove carbon dioxide from the atmosphere.
What does carbon dioxide do to the atmosphere?It causes a greater incidence of solar rays on the surface of the planet.It corrupts the ozone layer.Carbon dioxide is absorbed by plants during the photosynthesis process and this is important to keep the atmosphere free of this compound, but with the advancement of the use of fossil energies and intense deforestation, this compound accumulates in the atmosphere and causes various environmental problems, for this reason, using direct air capture technology can be beneficial to remove carbon dioxide from the atmosphere.
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Please help !!!!!!!!!!!
Answer:
1) Weathering, Erosion, Disposition
2) Physical weathering is the breakdown of large rocks into fragments by physical forces; the chemical composition of the rock is not changed. Chemical weathering is the breakdown of rock by chemical reactions; the chemical composition is changed.
3) The four forces of erosion are water, wind, gravity, and glaciers.
4) Because the velocity of the river slows down a great deal when it reaches the large body of water, the sediment that the river was carrying is deposited along the mouth of the large body of water.
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Abrasion: Abrasion is the breaking down and wearing away of rock material by the mechanical action of another rock. Three agents of physical weathering that cause abrasion are moving water, wind, and gravity. Also, rocks suspended in thence of a glacier can cause abrasion of other rocks on Earth's surface. This would be a prime example of physical weathering, or mechanical weathering.
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Acid Precipitation: Acid rain causes less erosion than normal rainwater does. Rainwater can break down rocks by dissolving minerals in the rocks. Acid rain is rainwater that is more acidic than normal rainwater. Acid rain can also dissolve the minerals in rocks faster than normal rainwater can. This is chemical weathering.
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Animal actions: Animal and plant mobility is a factor in biological weathering. For instance, a plant may grow in a gap in a rock and, as its roots spread, cause the fracture to expand. A rabbit may also burrow into a crack in a rock, making it wider and eventually separating the rock. This is an example of physical weathering.
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Ice wedging: Ice wedging ,sometimes known as frost wedging ,can also cause rocks to break apart. Ice wedging causes cracks in rocks to expand as water seeps in and the water freezes and expands opening the crack further. Rocks formed under pressure deep within earth can become exposed at the surface. This is physical weathering
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Oxidation: Oxidation is another kind of chemical weathering. It occurs when oxygen from air dissolves in water and combines with chemicals in the rocks to form oxides. if the rock contains a lot of iron, then oxidation produces a brown material called iron oxide. This looks like rust on the rock.
What is the difference between weathering erosion and deposition?Weathering is the chemical and mechanical breakdown of exposed rock. The chemical changes alter the minerals and make them softer, and mechanical weathering physically breaks rock into smaller and smaller pieces.
Erosion is the REMOVAL of those chemically and mechanically softer and broken pieces of rock from their original locations, by gravity, water, ice or wind. Erosion is transport (and as a result, fresh unaltered rock is exposed to wind, water and weather, and THAT becomes weathered in turn). The material being transported is ‘sediment’: sand, silt, mud and gravel.
Deposition is when the weathered and eroded (transported) material is dropped and settles down elsewhere, forming a ‘deposit’ of transported rock material.
If this deposit remains undisturbed long enough, and is buried by enough arriving material, it will eventually go through compaction and chemical reactions forming cement between the grains - thus resulting in a brand new, sedimentary rock.
Weathering, erosion, transport, deposition, compaction and cementation are part of the ‘rock cycle’.
How can the complete rock cycle be described?Let’s start with basalt that form at mid ocean spreading centers. At mid ocean spreading centers rock material from the earth’s mantle continuously melts due to continuous decreasing in pressure from the oceanic crust spreading at this point. The molten rock quickly cools at the earth’s surface and forms rock known as basalt that makes up the oceanic crust all over the world. The newly produced oceanic crust rock slowly moves towards a boundary with a continental crust where the oceanic crust subducts beneath the continental crust due to the oceanic crust having a higher density than the continental crust. This is where things get a bit more interesting.
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pls help (earth science)
The sedimentary bedrock in both regions originally formed as (1) horizontal layers
It should be noted that layer A is the oldest and layer D is the youngest.
The recently formed rock is siltstone.
How to explain the rocksThe principle of superposition can be utilized to determine the sequential ages of layers. According to this concept, in any succession of unaltered sedimentary rock strata, the oldest layer is situated at the bottom, while the youngest layer rests at the apex.
From investigation of the representation, layer A can be observed to lie at the bottom and layer D positioned at its peak; with layers B and C crammed between. Reciprocally, layer A can be concluded as being the eldest, whilst layer D being the most modernizing. The response, thusly, must be option (1) A.
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Look at the Punnett square above. Mom and dad are both heterozygous - which means they both have 1 dominant gene and 1 recessive gene.
What is the phenotype ratio (physical trait) for their offspring?
Dominant Gene: H - Purple Fur
Recessive Gene: h - White Fur
Genotypic Ratio: 1:2:1
Phenotypic Ratio: 3:1 (purple fur : white fur)
The laws of Mendel are three fundamental principles of inheritance that were discovered and described by the scientist Gregor Mendel in the 19th century. These laws describe how traits are passed down from parent to offspring and provide the foundation for our understanding of genetics.
The three laws of Mendel are:
The Law of Segregation: This law states that during the formation of gametes (sperm and egg cells), the two copies of each hereditary factor (allele) segregate so that offspring inherit one allele from each parent. This is also known as the principle of dominance, where one allele can be dominant over the other and determine the observable trait.
The Law of Independent Assortment: This law states that during gamete formation, the segregation of one pair of alleles is independent of the segregation of other pairs of alleles. This means that the inheritance of one trait is not influenced by the inheritance of another trait.
The Law of Dominance: This law states that when two different alleles for a given trait are present in an individual, one allele (the dominant allele) is expressed and the other allele (the recessive allele) is not expressed in the phenotype of the organism.
These laws help to explain the patterns of inheritance observed in sexual reproduction and have practical applications in the field of genetics, such as in predicting the likelihood of inherited genetic disorders and in breeding programs for plants and animals.
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Describe how Newton's 1st Law of Motion is used on a daily basis at school?
College biology help please
The mode of determination for cells in a developing vertebrate spinal cord is mediated by cell-to-cell signaling through Notch signaling pathway.
What is the Notch signaling pathway?The Notch signaling pathway is a highly conserved signaling pathway that plays a crucial role in regulating cell fate decisions during embryonic development.
In the vertebrate spinal cord, Notch signaling plays a critical role in specifying the fates of neural progenitor cells (NPCs) by promoting the maintenance of NPCs and inhibiting their differentiation into neurons.
This process is mediated by the interaction between the transmembrane receptor Notch on NPCs and its ligand Delta on neighboring cells, which leads to the activation of Notch signaling pathway in the NPCs.
The downstream effectors of the Notch signaling pathway then regulate the expression of genes that control NPC maintenance and differentiation, thereby determining the fate of the NPCs.
Therefore, the mode of determination for cells in a developing vertebrate spinal cord is mediated by the Notch signaling pathway, which is a form of cell-to-cell signaling.
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Which mode of nutrition do the cotton like threads formed on the moist bread have
Answer:
Heterotrophic mode of nutrition
Explanation:
Procedure for observing slide under microscope
Which of the following is not a defining element of culture?
A. Information shared among a population
B. Written symbols
OC. Information that is internalized
D. Information that is socially transmitted
B. Written symbols is not a defining element of culture as not all cultures have a written language or symbols. However, information shared among a population, information that is internalized, and information that is socially transmitted are all essential components of culture.
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In DNA recombination, what is created when the DNA is opened up at the restriction site?
Responses
A double-stranded DNAdouble-stranded DNA
B RNARNA
C sticky ends
Answer:
C. Sticky ends.
Explanation:
C. Sticky ends.
When the DNA is opened up at the restriction site during DNA recombination, the enzyme creates a double-stranded cut leaving short, single-stranded overhangs called sticky ends. These sticky ends can base pair with complementary sticky ends generated by the same restriction enzyme on another DNA molecule, allowing the two DNA molecules to be joined together. This process is used in DNA cloning and other genetic engineering techniques.
Question 3. Marine ecosystems ( include at least 2 citations and reference)
a) Describe a major plant of the estuary ecosystem.
b)Use the plant above to describe the main features of all estuary plants
a) A major plant of the estuary ecosystem is Spartina alterniflora,
.
b) Estuary plants like the Spartina alterniflora, have some distinct features that allow them to thrive in the ecosystem.
they are able to survive in areas with high salinity levelsthey are able to withstand fluctuations in water levels and are most times submerged during high tides and exposed during low tides. They are able to survive in nutrient-poor soils by forming mutualistic relationships with bacteria. what is the estuary ecosystem ?Estuaries ecosystem are described as bodies of water where rivers meet the sea that provide homes for diverse wildlife, including popular fish species. They also support recreation, jobs, tourism, shipping, and more.
The Spartina alterniflora, is described as a perennial grass that is commonly found in salt marshes and estuaries along the Atlantic and Gulf coasts of the United States.
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why did the fox population take a year to decrease if the hares are their prey and decreased?
Answer:
Prey leads predators
Explanation:
if the prey goes up predators goes up
if the prey goes down predators go down this is because with a small amount of prey the predators have less to eat and die off but of there is a lot then exponential growth happens with the predators until the prey goes down creating a loop
What is the purpose of the cell wall?
Group of answer choices
to convert energy from the sun into glucose
to transport protein around the cell
to create protein
to provide structure for an organism
Using the information from the reading, create a biomass diagram using lions/buffaloes/grasses what do you think it would look like based on what you know about the 10% rule?
Answer: It depends on the reading, but it should show the grass with the most energy, the buffalo with 90% less energy than the grass, and the lions with 90% less energy than the buffalo
Explanation: The ten percent rule states that, when energy is transferred from one organism to another, only 10% of the energy is conserved. The other 90% is lost as heat. So, heterotrophs (organisms that produce their own energy) like the grass would have the most energy, the buffalo would only receive 10% of that, and the lions only 10% of the buffalos' energy.
Click all that is true. The functions of proteins are:
transport important things in your body
build the structures of your body
enzymes to make chemical reactions go faster
send messages to cells
make antibodies to fight viruses
Answers:
2. build the structures of your body
3. enzymes to make chemical reactions go faster
5. make antibodies to fight viruses
The functions of proteins are:
transport important things in your body build the structures of your body enzymes to make chemical reactions go fastersend messages to cellsmake antibodies to fight virusesWhat are the properties of protein?Proteins are organic macromolecules made up of amino acids joined by peptide bonds. They have a complex and diverse structure and play many essential roles in the body. Some of the properties of proteins include:
Structural diversity: Proteins have a highly diverse structure, which is important for their many functions.
Amino acid composition: Proteins are made up of different combinations of 20 different amino acids.
Size: Proteins can vary greatly in size, from small peptides to large multi-subunit complexes.
Shape: Proteins can have complex 3D shapes that are critical to their function.
Solubility: Proteins can be either soluble or insoluble in water, depending on their structure and composition.
Stability: Proteins can be stable or unstable under certain conditions, such as changes in temperature, pH, or salt concentration.
Function: Proteins have a wide range of functions in the body, including structural support, enzyme catalysis, transport, and communication.
Denaturation: Proteins can lose their structure and function when exposed to certain physical or chemical conditions, a process known as denaturation.
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