Answer:
Oxygen would be played a key role in evolution of complex organisms because this molecule is required to efficiently produce chemical energy during cellular respiration
Explanation:
Chloroplasts originated from endosymbiotic cyanobacteria 1,500 million years (mya) ago. Like chloroplasts, mitochondria originated from cyanobacteria, and also approximately at the same time. Mitochondria are organelles capable of generating energy by burning oxygen during cellular respiration (aerobic respiration). During this period (1,500 mya), complex cells became able to efficiently produce energy by using oxygen in aerobic reactions, which can be attributed to the emergence of mitochondria. Interestingly, it has been shown that during the next 500 mya, different groups of organisms composed of more than 50 different cell types evolved (including algae, fungi and early animals). Therefore, it is possible to hypothesize oxygen would be a critical molecule without which complex organisms couldn't evolve.
Oxygen played a vital role in evolution of complex life because the transfer of electrons from organic molecules to oxygen released a large amount of energy, thus resulting in efficient production of chemical energy during cellular respiration.
For life to exist, energy must be available and abundantly so, in order to carry out the vast array of activities that makes life possible.
At first, only simple life forms which did not depend on oxygen existed. This life forms were collectively known as anaerobes.
Because the electron acceptors they used then were not very efficient in accepting electrons during the oxidation of organic compounds to produce energy, life remained in simple forms as microorganisms.
However, as the atmosphere became progressively richer in oxygen, some anaerobic microorganisms evolved who were able to obtain energy by passing electrons to oxygen.
Endosymbiotic associations which eventually became permanent between aerobic and anaerobic microorganisms gave rise to structures such as the mitochondria, plastids and chloroplasts.
This ability to effectively use oxygen as electron acceptors to produce energy as in mitochondria as well as produce oxygen as in chloroplasts led to the appearance of more complex life forms who were able to carry out more complex life activities due to efficient production and utilization of energy. These life forms include the algae, fungi and early multicellular animals.
Therefore, it can be concluded that oxygen played a vital role in evolution of complex life because the transfer of electrons from organic molecules to oxygen released a large amount of energy, thus resulting in efficient production of chemical energy during cellular respiration.
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True or false consumption efficiency in Huckleberry patches is high like in a forest ecosystem
Answer:
True
Explanation:
Assume that plant height is determined by a pair of alleles at each of two loci (A and a, B and b) that are additive in their effects. Further assume that each allele represented by an uppercase letter contributes 6 feet to height and that each allele represented by a lowercase letter contributes 2 foot to height. If a plant with genotype AaBB is crossed to a plant with genotype aaBb, what heights are expected in the progeny
Answer:
16 feet, 20 feet, and 12 feet
Explanation:
Uppercase allele = 6 feet
Lowercase allele = 2 feet
First, let us look at the outcome of the cross between AaBB and aaBb.
AaBB x aaBb
Progeny:
4 AaBB = 6+2+6+6 = 20 feet
4 aaBB = 2+2+6+6 = 16 feet
4 AaBb = 6+2+6+2 = 16 feet
4 aaBb = 2+2+6+2 = 12 feet
The heights expected in the progeny are 16 feet, 20 feet, and 12 feet.
PLEASE HELP ASAP TY!!
How can new information about DNA help taxonomists?
Answer:
DNA evidence allowed biologists to identify a new type of bacteria Taxonomy is the system biologists use to name living things. DNA evidence allows us to see how related living things are to one another, verifying the naming system.
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Here’s the first one
Which statement is most supportive of the claim that genetic diversity is an advantage of sexual reproduction?
Genetic variation from sexual reproduction ensures that at least some individuals will have advantageous traits that help them survive.
Asexual reproduction results in the same genes being copied, which means the same vulnerabilities in the population.*******
Sexual reproduction creates genetic diversity, which results in a wide range of appearances in a population.
Lack of genetic diversity from asexual reproduction results in a diminished ability to survive changes to the environment.
What is the most likely explanation for a child exhibiting a heritable trait that neither parent exhibits?
The trait was passed on by a different biological parent, and one of the child's parents is not biologically related.
The trait was inherited from a more distant relative, like a great-grandparent.
The parents carried a second trait that masked the trait of interest.
The trait is recessive, so both parents carry it, and the child inherited each recessive allele.**********
Which statement has exceptions?
Sexual reproduction requires two parents, whereas asexual reproduction requires only one parent.
Sexual reproduction produces genetic variation, but asexual reproduction does not.
Sexual reproduction is more complex, while asexual reproduction is a simpler process.
Sexual reproduction involves parental care, while asexual reproduction does not.******
Assume a bacterial cell failed to replicate its DNA before it reproduced two daughter cells. The reproduction would result in
neither cell containing DNA.
both cells containing DNA.
one cell with DNA and one cell without DNA.*******
one cell with DNA and one cell with two sets of DNA.
A parent bacterial cell is able to survive in the presence of the antibiotic penicillin. Subsequent generations from this parent will be _______ penicillin.(1 point)
resistant to*****
killed by
dependent on
vulnerable to
Hydras are animals related to coral and jellyfish. Hydras can reproduce sexually or asexually. Why would hydras avoid reproducing asexually when conditions are difficult?
The lack of genetic diversity could mean that all of the hydras die, depending on the situation. ******
The high genetic diversity could mean that all of the hydras die, depending on the situation.
Reproducing more rapidly would be a good way to take advantage of plentiful resources.
Reproducing more slowly would be a good way to take advantage of plentiful resources.
Answer:
yeah the first one
Explanation:
just because
Using academic language, explain why we always see the same face of the Moon.
Convert 6.2 Dag to kg.
Answer:
0.062000000000000006
Explanation:
Answer:
0.062
Explanation:
The Rock Cycle
Select the incorrect statements by clicking on the sentences.
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LEE
The rock cycle describes the way that rock material cycles through Earth's crust. All
rocks start out as lava or magma that cools into igneous rock. An igneous rock must then
be weathered into sediments for the next stage of the cycle. Sediments are compressed
and cemented to become sedimentary rock. Metamorphic rock forms when rocks are
heated and squeezed deep in Earth's crust. New igneous rock forms when metamorphic
rock is heated so much that it melts into magma, which cools into igneous rock. All rocks
go through this cycle over and over again.
Results
bo...
Cloy
Аа
Language
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Answer:
The rock cycle describes the way that rock material cycles through Earth's crust.
All rocks start out as lava or magma that cools into igneous rock.
Explanation:
The Rock Cycle is a process in Earth's crust of creating and forming different types of rocks. Through this process, three primary rocks are formed: Igneous rock, Sediment rocks, and metamorphic rocks.
From the given statements, the statements which are not true about the rock cycle are:
First one, the rock cycle does not desrcibe the way rock material cycles through Earth's crust but it is a process which creates and transforms different types of rocks.
Second statement is also wrong, because only igneous rocks starts out as lava or magma.
Therefore, statement first and second are not true.
What are the atomic masses of
protons, neutrons, and electrons?
Answer:
Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus. However, protons have a charge of +1, and neutrons are uncharged. Electrons have a mass of approximately 0 amu, orbit the nucleus, and have a charge of -1.
Explanation:
The nucleus contains protons, neutrons, and electrons, each of which has a mass of 1 amu. Neutrons are uncharged, while protons have a charge of 1.
Thus, Electrons circle the nucleus, having a mass of about 0 amu, and a charge of -1.
Atomic mass of a proton: A proton's atomic mass is about equal to 1.007276 atomic mass units (u), or 1.007276 amu.
Neutron: A neutron has a slightly larger atomic mass than a proton. About 1.008665 u or 1.008665 amu is what it is. Electron: Compared to a proton or neutron, an electron has a substantially lower mass. An electron has a mass of roughly 0.00054858 u or 0.00054858 amu.
Thus, The nucleus contains protons, neutrons, and electrons, each of which has a mass of 1 amu. Neutrons are uncharged, while protons have a charge of 1.
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Explain how photosynthesis and cellular respiration work together?*
Photosynthesis and Respiration both make energy
One process give molecules to the other process
Photosynthesis is more effective than respiration
Answer: one process gives molecules to the other process
Explanation:
The net amount of carbon in the atmosphere between 1750 and 2012 ___________.
Answer:
From 280 ppm to 393 ppm.
Explanation:
In 1750, the amount of carbondioxide in the atmosphere was 280 ppm which increases by 393 ppm in 2012. This is because of the pollution occurs due to industrialization and number of vehicles increased in the world. More carbondioxide gas is released due to the smoke produced from burning of fossil fuels in industries and vehicles. So we can say that pollution is the main reason for increasing carbondioxide concentration in the atmosphere.
Other than shape, what characteristics are used to identify the various bacterial species?
Answer:
Explanation:
One major characteristic used to identify bacterial species is by Gram staining. This makes bacteria to be classified into two broad classes; Gram positive bacteria (appear purple after stain) and Gram negative bacteria (appear pink after stain).
Another characteristic used is the presence or absence of capsule.
Other characteristics include there motility (which can be due to the presence of flagella), bonding tendency (which can be individually or in pairs) and also pathogenic bacteria can be classified as intracellular or extracellular bacteria.
Ability to be molded. A:density B:plasticity
About how wide are the growth rings for the Rainy years.
Answer:
About 0.6 cm 5.
Explanation:
True or False:
The deletion of a single base in a gene would alter the structure of the gene’s protein more than the substitution of one base for another
Answer:
True
Explanation:
Mutation is any change that occurs to the nucleotide sequence of a gene. Mutations can be of different types including: deletion, insertion, substitution etc.
Deletion mutation refers to the removal of one or more base from the nucleotide sequence while substitution mutation refers to the replacement of one or more nucleotide bases.
DELETION of a single base in a gene would alter the structure of the gene’s protein more than the substitution of one base for another. This is because deletion mutation can cause the reading frame of the nucleotide sequence to change, leading to a SHORTER STRUCTURE of protein.
PLEASE ANSWER I HAVE 5 MINUTES
If a molecule of DNA has 32% guanine before DNA replication occurs, each new
molecule of DNA that is produced following replication will contain what percentage
thymine?
A) 64%
B) 32%
C) 18%
D) 36%
Answer:18%
Explanation:18x2=36 +64=100
following
Description
Regulates entry and exit of materials into and out of the cell?
Controls all the cell's activities?
Contains cell sap?
The site where most of the cell's chemical reactions take
place?
Answer:
1. plasma membrane
2. nucleus
3. central vacuole
4. Cytoplasm
Explanation:
What role does iodine play within the thyroid?
Select the true statementabout unmyelinated axons:A. action potentials occur everywhere along the length of the axon, and propagation is faster than in myelinated axons.B. action potentials occur everywhere along the length of the axon, and propagation is slower than in myelinated axons.C. action potentials occur only at some points along the axon, and propagation is fasterthan in myelinated axons.D. action potentials occur only at some points along the axon, and propagation is slower than in myelinated axons.E. Unmyelinated axons do not exhibit action potentials.
Answer:
The correct statement is - option B.
Explanation:
Unmyelinated axons are the axon that lacks the covering of scwann cells that form the myelin sheath which helps in the transfer or transmit the signals faster and more effectively in neurons. It acts as the insulating layer.
In absence of the myelin sheath, the action potential found everywhere along the length of the axon which leads to slow propagation than in myelinated axons.
Thus, the correct answer is - option B.
Explain why habitats with high biodiversity tends to contain narrow ecological niches and white habitats?
Answer:
because they reduce interspecific competition
Explanation:
Narrower niches are known to be more specific and limited compared to broader niches, which are generally less specific and less limited. The species that live in broad niches are named generalists because they are able to withstand different conditions. A narrow niche is often correlated with reduced overlap and thus tends to reduce interspecific competition. For example, coral reefs consist of a wide variety of species (including anemones, sea sponges, sea fans, brain corals, etc) which have narrow niches, thus showing high biodiversity.
Which of the following is not true of the North American Southwest?
a. It was mainly made up of farming cultures, which were slower to arise in the American
Southwest
b. The North American Southwest included the areas of present-day New Mexico, Colorado,
Arizona, and Utah.
c. They built large-scale irrigation systems and elaborate, multi-storied structures.
d. The Natives of the North American Southwest produced an abundance of basalt sculpture.
Answer:
D
Explanation:
The Natives of the North American Southwest produced an abundance of basalt sculpture.
The Natives of the North American Southwest producing an abundance of basalt sculpture is False.
What is Basalt sculpture?This is defined as the use of the igneous rock known as basalt to carve and shape objects.
The natives of the North American Southwest didn't produce an abundance of basalt sculpture due to lower quantity of basalt in the region which is why option D was chosen.
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how does the gulf stream affect the air masses above ocean water
Answer:
Locally, particularly off the coast of North Carolina, the Gulf Stream can affect water temperatures, providing warmer ocean waters and balmy days, even in the height of fall and winter.
Explanation:
The Gulf Stream affects the air masses above ocean water by:
Providing the ocean with warmer waters even during cold seasonsThe Gulf Stream is known as the strong current which occurs along the coast of Florida where there are warmer temperatures in the cold seasons and cooler temperatures in the warm seasons.
As a result of this, the Gulf Stream affects the air masses which are above the ocen water by making sure that the weather is more pleasant no matter the season of the year and it has also extended to parts of Europe.
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Old thermometers contained very small amounts of mercury. The mercury in the photo has a melting point of -38°C. What can u conclude about the melting point of the mercury in the old thermometer?
Answer:
The thermometer can not be used to measure very low temperature
Explanation:
Mercury-in-glass thermometer is one of the types of liquid-in-glass thermometers.
Given the very melting point of mercury, it is unsuitable to attempt to use this thermometer for very low temperature measurement.
Hence, from the melting point of mercury, this thermometer can not be used to measure very low temperature.
PLEASE HELP ME someone help me finish the rest
Answer:
C-Chromosomes
D- DNA
E- Gene
Explanation:
12
Select the correct answer from each drop-down menu.
A son and Robert have a search warrant for a suspect's home. They know that if they announce themselves at the suspect's home the suspect
can quickdy destroy evidence. What type of warrant should Allison and Robert request?
Normally search and seizure rules require the
rule. This means that officers must wait a reasonable amount of
time for the occupant to answer. However, based on the situation. Alison and Robert request an)
✓ warrant
allowing them to enter the premises immediately.
Reset
Next
Answer:
Allison and Robert should request a No-Knock Warrant.
Explanation:
A search warrant is a legally binding document that must be acquired by law enforcement officers or investigators before they can open up, enter and search a building. There are various types of search warrants.
Standard search and seize warrants require that law enforcement officers have to identify themselves and allow the occupant a significant amount of time to react. They'd have to knock or ring the doorbell in this situation.
Because law enforcement agents began to see the continued destruction of evidence before they got in, it necessitated the design of another kind of search warrant - the No-Knock Warrant.
By comparison, Allison and Robert will enter the suspect's house violently without advance warning with a No-Knock Warrant, so that if there is any evidence that can be used against the suspect, they will confiscate and protect it to prevent it from being destroyed.
Other types of warrants are:
Warrant to Arrest Warrant for Bench Arrest Warrant for Child Custody etcCheers
Which of the following statements regarding the human
population are TRUE? Select TWO.(Remember, there is no
partial credit)
SELECT ALL THAT APPLY
The world's population of humans is
increasing.
In every country, the human population is
increasing.
In some countries, the human population is
decreasing or staying the same.
The world's population of humans is
staying constant
Answer:
The world's population of humans is
increasing.
and
In every country, the human population is
increasing.
In the natural selection simulation we set the fitness of rr individuals to 0. Why does the r allele persist in the population?
Answer:
In the clarification section elsewhere here, the definition of the concern is mentioned.
Explanation:
The notion of fitness seems to be the basic phenomenon of Fisher. Fitness is a dynamic term since it is the calculation by a person in his lifetime of the cumulative production of viable progeny. The fitness of an organism is zero even though no offspring is created. With a growing life span as well as the amount of order to promote innovation, flexibility increases. Members of an organization that are very well-adapted to that certain range of environmental factors have had a benefit in the mechanism of selective breeding over others who might not be as possibly the best adapted. The benefit falls throughout the form of genetic diversity and longevity. Those people who are much more able to easily find and use food supplies, for example, would live considerably longer and have more offspring than someone who is less reliable at seeking food. Inherited features that increase human fitness are then passed on to their descendants, thereby providing this very same value to the descendants. The disappearance of fewer adapted varieties seems to be the most drastic alternative. Unless the best-adapted variant doesn't adjust even though it is as when the optimum balanced local, so for the ideal characteristic, less drastic will delete both-new variant.Since less drastic selection has become too inadequate to aggressive edge mutations, the aggregation of missense mutations will happen and even the outcome would be a progressive deterioration of genomic integrity. If it maintains you prolonged enough, this should contribute to disappearance for certain species; nevertheless, the subsequent widespread presence of the deleterious mutations just seems like such a genome would then inevitably also contribute to backward mutation incidence. Extinction could result if the intense choice has become too high for the entire world, because if the world is saved in time.If a person is dominant for the trait, does one of their parents have to have the Taster trait?
Answer:
no
Explanation:
There are several different kinds, but the one you pick doesn't do its job?
the answer to the riddle is a lock.
Which term best describes the macromolecule shown below? А monosaccharide В polysaccharide С amino acid D nucleic acid
Answer:
B. Polysaccharide
Explanation:
A polysaccharide is a carbohydrate molecule made up of several units of monomers called monosaccharides linked together by glycosidic bonds. The monosaccharide is the simplest unit of a carbohydrate with the general formula, (CH2O)n.
However, the monosaccharides, which include glucose, fructose, galactose etc can link up by a bond to form a much larger carbohydrate molecule called POLYSACCHARIDE. As depicted in the image attached to this question, each ring is a monosaccharide, which becomes linked to one another to form a polymer called polysaccharide. Examples of polysaccharides are starch, glycogen, cellulose
Expected response to skin injury if tissue lost normal cell characteristic
Answer:
excessive growth of replacement tissue
Explanation: