A forest fire burns down most of the trees in a large forest. The animals that live in the trees are forced to move to other areas. What kind of disturbance is this?
A. Cyclical
B. Small
C. Primary
D. Secondary
Answer: D. Secondary
Explanation:
An ecological disturbance is a circumstance caused by an agent that can be of biological or non-biological origin. The agent is capable of bringing negative changes to an ecosystem. Fire is an example of ecological disturbance. In the given situation, the forest burns down the trees are an example of the direct interaction of fire with the trees; therefore, it is a primary disturbance. Nevertheless, this interaction led to the loss of habitat of animals forced to move to other areas as the fire burned the trees. It is called secondary disturbance.
Heat is transferred to two different solids, A and B, at the same rate. Both A and B are initially at the same temperature. The mass of A is 4-times that of B, while the specific heat capacity of B is twice that of A. After 5 minutes of heating, which of the following statements is correct?
a) The temperature of B is twice that of A
b) The two are at the same temperature
c) The change in the temperature of A is half that of B
d) The change in the temperature of A is 4-times that of B
The two solids are at the same temperature
Explain how the circulatory system is able to transport the blood under high pressure from the heart to the rest of the body
Transport of blood under high pressure is done through the concerted efforts of the heart and arteries.
The circulatory system is the network of the heart, arteries, veins, and capillaries responsible for the movement of blood around the body.Transporting blood under high pressure can be explained in the following steps:
Contraction of the heart ventricles creates blood under high pressureHigh pressured blood is removed from the heart through the arteries. In addition, the arteries are able to contract and expand, thus are elasticThe lumen of the arteries is narrow thus helping in maintaining high pressureAs a result of the above, the high pressure of blood is maintained and transported to the extremities of the body.
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what is the significance of diffusion and osmosis in living organism ?give one example in support of your answer
Answer:
Diffusion is the process in which molecules and ions move from a region of high concentration to low concentration. Its also how cells transport waste out of the cell and nutrients into it hence being very crucial. Diffusion also occurs without the expenditure of extra energy using a procedure known as passive transport. (Osmosis is a form of diffusion but deals with water exclusively).
Examples of where diffusion is important;
In the intestines - Digested food molecules such as amino acids and glucose move down the concentration gradient from the intestine into the bloodstream. Wastes such as carbon dioxide or urea travel via diffusion from the body's cells to the bloodstream.
Osmosis plays a major role in living organisms. It aids in the transportation of nutrients from cells to cells and also helps to remove the waste's metabolic products from the cell. The purification of blood in the kidneys is also dependent on the process of osmosis.
Explain how an arteriole can reduce the blood flow into capillaries
The arteriole can reduce the blood flow into capillaries because the pressure difference between two ends.
What is the function of arterioles?
Arterioles are final branches of the arterial system. Arterioles regulate the distribution of blood in different capillary beds by vasoconstriction and vasodilation in localized regions, because their walls contain circularly arranged smooth muscle fibers.
So the flow through a blood vessel is entirely determined by the pressure difference between the two ends of the vessel, which is the force pushing blood forward through the vessel, and the obstacle to flow.
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Please select the word from the list that best fits the definition "falling rain or snow" A. evaporation B. condensation C. precipitation D. water cycle
A metabolic reaction will most likely reverse itself when the ____
A metabolic reaction will most likely reverse itself when the concentration of its products is too high.
What is a metabolic reaction?A metabolic reaction is a chemical reaction that generates one of more products, which are used by the body.
Metabolic reactions are homeostatically controlled in order to maintain the internal body equilibrium.
In conclusion, a metabolic reaction will most likely reverse itself when the concentration of its products is too high.
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Why is it necessary for meiosis to produce cells with fewer chromosomes>
Answer:
A. It saves energy for the organism to produce fewer chromosomes.
B. Asexual reproduction requires fewer chromosomes than sexual
reproduction
C. If it did not, the chromosome number would double in each
generation
D. Organisms reproduce sexually by joining two tetrads together.
What makes plants wilt?
C. a lack of stability that would usually come from the
ribosomes
A. a lack of turgor pressure that would usually come
from water stored in the central vacuole
B. a lack of motility that would usually come from the
nucleus
Answer:
A
Explanation:
Due to the hot weather the plants moisture start to decrease until they wilt.
Answer: a lack of turgor pressure that would usually come from water stored in the central vacuole
Explanation: Dehydration.
Which pattern is caused by fire burning upward
Pour patterns
V-pattern
Rundown pattern
Inverted cone
Please only answer if you know
V-pattern caused by fire burning upward. Thus, the correct option is B.
What do V patterns in burn mean?V-Patterns: Because fire burns up in a V-shape, a fire that starts at an outlet next to a wall will leave a char pattern that will help identify the source. A fire that is hotter than usual, such as one aided by an accelerant, may have an extremely narrow V-shape.
The observable or quantifiable physical changes or recognisable shapes produced by a fire effect or combination of fire effects are known as fire patterns, sometimes known as burn patterns. The changes that occur in or on a substance as a result of exposure to fire are known as fire effects.
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Endosymbiosis is considered
a(n)...
A. state.
B. experiment.
C. law.
D. theory.
Answer:
D. theory.
Endosymbiosis is considered a theory.
Explanation:
Endosymbiosis explains the origin of chloroplast and mitochondria, and it also explains how the eukaryotic cells came to be.
Hope this helps!
If not, I am sorry.
what does the autonomic nervous system do ?
The autonomic nervous system controls internal body processes such as the following: Blood pressure, Heart and respiratory rates and Body temperature.
What is the function of the autonomic nervous system?It helps to maintain the stability and internal balance of the body, through the coordination of various activities such as hormone secretion, circulation, respiration, digestion and excretion.
this system is a functional division of the nervous system, and has parts in the central nervous system (CNS) and the peripheral nervous system (PNS). It unconsciously controls the glands and smooth muscle of all internal organs.
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What embyonic germ layer gives rise to nervous tissue?
The embryonic germ layer that gives rise to nervous tissues is the ectoderm.
Embryonic layersThere are 3 types of embryonic layers for triploblastic animals:
The endoderm: this develops into the gut and other internal organs.The mesoderm: this develops into muscle cells and connective tissuesThe ectoderm: this develops into nervous tissues and epidermisMore on embryonic layers can be found here: https://brainly.com/question/9599868
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A. Describe how the biomass in the bluegill fish trophic level of a biomass pyramid would be
different from the biomass in the aquatic plants trophic level of the same pyramid.
The biomass would be different because aquatic plants are producers while bluegill fishes are consumers.
Pyramid of biomassIn a food chain or food web, the biomass of the population of organisms at the lower trophic levels is usually more than that at the higher trophic level.
Thus, producers tend to have more biomass than primary consumers. Primary consumers tend to have more biomass than secondary consumers.
In the same vein, secondary consumers have more biomass than tertiary consumers.
Bluegill fishes are consumers while aquatic plants are producers. Thus the biomass of aquatic plants would be more than that of bluegill fish.
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Which of these is true for a daughter cell produced by mitosis?
A. It functions in the same way as the parent cell.
B. It has more cytoplasm than its parent cell had.
C. It is unlike any other cell in the organism.
D. It is always a haploid cell.
What do structures B and C have in common?
A.both contain chyme
B.both contain partially disgested food
C.both contain waste material ready for removed
D.both contain stored food
The structures B and C have in common is that both contain partially disgested food. Thus, the correct option is B.
What are structures B and C here represent?Structure B represents the food pipe or esophagus, while structure C represents the stomach.
Chyme is produced only when food is fixed with gastric juice which is only present in the stomach, hence option A is incorrect.
Waste material is found in the rectum of the body structure, not in the esophagus and the stomach. Thus, option C is also incorrect.
Therefore, the correct option is B.
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You are a mosquito and your body cells have 3 pairs of chromosomes, giving you a total (diploid) number of 6 chromosomes. After mitosis, how does the number of chromosomes in the daughter cells compare to the number of chromosomes in the parent cell? Why is this important?
At the beginning of mitosis, a mosquito cell has six double-stranded chromosomes. This cell will have split into two daughter cells with six chromosomes each at the end of mitosis. Consequently, 6 chromosomes will be provided to each daughter cell (single-stranded).
What is mitosis?One cell divides into two genetically identical daughter cells during the cell duplication process known as mitosis. The cell's chromosomes are duplicated throughout the process of mitosis and then divided equally between the two daughter cells' two new nuclei.
Every chromosome acquires identical copies of the parent cell's DNA thanks to anaphase. At their centromere, the sister chromatids divide in half to form distinct, identical chromosomes.
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Which is the result of a seasonal change?
A. Trees dying from air pollution
B. A bear hibernating
C. A bat capturing mosquitoes
D. Average temperatures rising each year
Answer:
B. A bear hibernating
Explanation:
The other options are not specific to seasons, but bears consistently hibernate annually in the winter.
different between seed method and biological method of breeding
please help
Answer:
Plant breeding is the purposeful manipulation of plant species in order to create desired genotypes and phenotypes for specific purposes. Plant genetic is is the study of genes, genetic variation, and heredity specifically in plants.
The seed method involves selecting plants with desired traits and breeding them to produce offspring with those traits and the biological method involves using mutation breeding, tissue culture, and genetic engineering to create new plant varieties.
What is seed and biological methods of breeding?The seed method and the biological method of breeding are two approaches that are used to develop new plant varieties.
The seed method involves selecting plants with desired traits and breeding them to produce offspring with those traits. This can be done through various techniques, such as crossbreeding, inbreeding, and hybridization. The seed method relies on the transfer of genetic material through the seed, and it is often used to develop new varieties of crops that are well suited to specific growing conditions.
The biological method of breeding involves using techniques such as mutation breeding, tissue culture, and genetic engineering to create new plant varieties. This approach involves altering the genetic makeup of plants in order to introduce new traits or to enhance existing ones. The biological method can be more precise and faster than the seed method, but it also involves more complex techniques and may be more expensive to implement.
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a fishery is considered collapsed when the annual catches fall below _____ of their historic high. the stocks can no longer support the fishery.
A fishery is considered collapsed when the annual catches fall below 10 percent of their historic high.
What is a Fishery?This process involves rearing and harvesting of fishes for domestic or commercial purposes.
When the annual catch falls 10 percent below its historic high it means it has collapsed due to decrease in their number with the stocks no longer being able to support the fishery
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Soli reaction is ______
Answer:
soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units
which animals has a better chance of survival fox or leopard. why??
Answer:
Fox has a better chance of survival due to its thinking capacity as smartness.
Answer:
hope it is helpful for you but is very long but it is right way to write this answer if you like this answer please make me brilliant
Explanation:
fox have a server adaptations that allow them to survive their round compact bodies minimise surface area that expose the cold air the muscle years and legs are short which is also conserve heat
leopards are a solitary creatures that only spent time with others when they are making or racing young
they are also nocturnal and spent their nice hunting instead of sleeping leopard spent a lot of their time in trees there spotted comouflages them making template in with the leaves of the three
Which of the following are complementary pairs in DNA:
True
False
Answer:
B) C - G
Explanation:
There are only 2 complementary bases in DNA which are:
A - TC - G19.8)What type of cell is illustrated here?
What part of the cell is #1?
What part of the cell is #2?
What part of the cell is #3?
What part of the cell is #4?
What part of the cell is #5?
Bacteria are ____________ organisms lacking membrane-bound organelles.
The blank space in the task content should be filled with; Prokaryotic (unicellular).
What are bacteria?Bacteria are a host of unicellular organisms prokaryotic in nature, and are characterized by lack of a true nucleus and other cellular organelles. The bacteria cell is most often composed of the cell wall, plasmid, cytoplasm and flagella.
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Bacteria are single-celled organisms that lack membrane bound organelles
Single celled organisms are also know as prokaryotes. The characteristics of prokaryotes includes;
- They lack nuclues
- They reproduce asexually(binary fission)
- Their cell wall is composed of amino acids and carbohydrates
Bacteria are found all over our surroundings, they can also be found in the human body. They come in different shapes and structures such as cocci, rod, vibro, spiral.
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The diagram below shows some relationships between ecosystems near the
Sonoran and Chihuahuan Deserts. What kind of ecosystem is the thornscrub?
Temperate
Forest
Madrean
Woodland
(sporadically
Interior Chaparral)
Semidesert Grassland
Thornscrub
Desert
A. Badland
B. Shrubland
C. Wetland
D. Grassland
9000 feet
8000 feet
7000 feet
-6000 feet
-5000 feet
4000 feet
3000 feet
-2000 feet
1000 feet
Based on the ecosystems located near the Sonoran and Chihuahuan Deserts, an ecosystem which the thornscrub belongs to is: B. shrubland.
What is thornscrub?Thornscrub can be defined as a transitional biome that exist between a tropical and desert forest. This ultimately implies that, thornscrub comprises grasses, geophytes, and herbs,
In this context, we can infer and logically deduce that an ecosystem which the thornscrub belongs to is shrubland because it's typically made up of a plant community.
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What is the second artery that branches off the aortic arch?
The second artery that branches off the aortic arch is the left common carotid artery.
What is the left common carotid artery?The left common carotid artery is a blood vessel that emerges from the aorta in the hearth.
The left common carotid artery is one of the most important branches of the arterial system.
In conclusion, the second artery that branches off the aortic arch is the left common carotid artery.
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Which of the following is considered a sustainable use of a common?
Fishing regulation
Grazing on public land
Plastics in oceans
Water pollution
Answer:
Explanation:
air polution
Even when asymptomatic, _______ can still be actively multiplying and killing cells in the immune system that help fight pathogens.
Even when asymptomatic, the virus can still be actively multiplying and killing cells in the immune system that help fight pathogens. This is further explained below.
What is a virus?Generally, the virus is simply defined as a virus consisting of a core of genetic information, either DNA or RNA, wrapped by a capsid, which is a protective covering formed of protein.
In conclusion, It is possible for the virus to be actively reproducing and destroying immune cells even in the absence of any outward symptoms.
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Control group is important for scientific study ? and why ?