human disruption of the carbon cycle has been implicated in..?
Answer:
D. Climate change
Explanation:
The carbon cycle is disrupted by several activities of man which includes burning if fossil fuels anong others. These leads to accumulation of huge amounts of carbon dioxide in the atmosphere which leads to global warming. The resultant effects of global warming is what one of the major cause of climate change.
Therefore, human disruption of the carbon cycle can be said to have been implicated in climate change.
How are mitosis and meiosis the same and different?
PLEASE HELP I WILL GIVE BRAINLIEST
Why would someone be in pain when showering with ceratopogonidae bites?
Answer:
the midge will pierce the skin with her mouth and pump saliva into the wound to prevent it clotting. It's this saliva which causes a mild immune response in humans, resulting in itchy red spots as the body seeks to repair the wound.
Explanation:
because the people want to scratch the bites which makes them worse
Answer:
YES,the midge will pierce the skin with her mouth and pump saliva into the wound to prevent it clotting. It's this saliva which causes a mild immune response in humans, resulting in itchy red spots as the body seeks to repair the wound.
Both species of garter snakes prey on the California newt, Taricha torosa, a small amphibian that produces a potent neurotoxin (TTX) in its skin. However, neither species of garter snake is affected by TTX. The resistance to TTX is associated with mutations in the SCN4A gene. Which of the following best supports a claim that
a. TTX resistance arose independently in T.
b. atratus and T.
c. sirtalis
Complete question:
Both species of garter snakes prey on the California newt. Taricha torso, small amphibian that produces a potent neurotoxin (TTX) in its skin. However, neither species of garter snake is affected by TTX. The resistance to TTX is associated with mutations in the SCN4A gene. which of the following best supports a claim that TTX resistance arose independently in T. atratus and T. sirtalis?
A. The stomach contents in fossils of both species include the remains of food items that contains TTX.
B. Both species of snakes possess the SCN4A gene.
C. The two species of snakes have different genetic mutations in the SCN4A gene.
D. T. atratus and T. sirtalis are sister species that share many of the same morphological features.
Answer:
C. The two species of snakes have different genetic mutations in the SCN4A gene.
Explanation:
These are two different species that feed on the same amphibian species and that developed resistance to TTX. Resistance to the toxic is associated with mutations in the SCN4A gene. So probably both species by separated developed different mutations in the gene that led them to be resistant to the toxin.
Supporting the fact that natural selection is not random, both species might have become resistant to TTX through different mutations in the same gene. Both species are feeding on the California newt that produces neurotoxin in the skin. Animals that feed on this amphibian need to be resistant to the toxin to avoid death and keep preying. TTX might be acting as a modeling pressure that led snakes to develop resistance to the toxin, favoring the same phenotype but independently.
A. The stomach contents in fossils of both species include the remains of food items that contain TTX. → Food items with TTX in the stomachs do not mean that species were resistant to the toxin. And if they were, it does not mean that species developed the resistance independently or not.
B. Both species of snakes possess the SCN4A gene. → The fact that both species have the gene does not mean that they have mutations in the gene
C. The two species of snakes have different genetic mutations in the SCN4A gene. → That both species have different mutations in the same gene means that they evolved independently from each other. They suffered different mutations in the same gene that led them to express the same resistance phenotype.
D. T. atratus and T. sirtalis are sister species that share many of the same morphological features. → Morphological features do not necessarily reflect molecular features. The fact that they are similar sister species does not say anything about the SCN4A gene.
The condition that best supports this experiment is the two species of snakes have different genetic mutations in the gene described above.
What do you mean by Mutations?Mutations may be defined as sudden, stable, and inheritable changes in the genetic material of an organism.
Both species of snake have different mutations in the same gene means that they evolved independently from each other. They undergo different mutations in the same gene that led them to express the same resistance phenotype.
Therefore, the condition that best supports this experiment is the two species of snakes have different genetic mutations in the gene described above.
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give proof and show work and ill give brainliest
Answer:
An outbreak of a disease that infects squirrels in the park.
Explanation:
All the other answer choices would increase the population of squirrels. For the first option, more trees = more habitats = more squirrels to live in. For the second option, less hawks = less predators = more squirrels that will survive. For the third option, heavy rain = more acorns = more food for more squirrels.
Only the last option would limit the growth of a population of squirrels since diseases kill organisms in a population.
What must always be present in order to form a true scientific explanation?
I’ll give points + brainalist (:
Approximately 5 percent of the present human genome consists of segmental duplications that have arisen during the past 35 million years. How do you suppose researchers are able to estimate how long it has been since a particular region of a chromosome was duplicated
Answer:
by using molecular clocks which are based on the mutation rates among molecular sequences (e.g., DNA sequences). The mutation rate can be used to estimate the times of divergence between sequences (in this case, between duplicated sequences in the target species and non-duplicated sequences in the most recent common ancestor).
Explanation:
A molecular clock is a technique that uses the mutation rate (μ) to measure the association between evolutionary rate and time. A mutation rate can be used to estimate the time in prehistory when two or more molecular sequences diverged. For example, assuming a generation time of 20 years, a species that has 100 mutations per generation is divided by 20 years to yield a mutation rate equal to 5 mutations per year. In consequence, the times of divergence can be estimated by dividing half of the target genomic region length (in nucleotides) by the mutation rate (t = d/2 ÷ μ).
Explain in detail the types of heterotrophic nutrition in plants. Give two examples of each type.
Answer:
HOPE IT HELPS..
MARK AS BRAINKLISTT
Heterotrophic nutrition can be one of three types , holozoic, saprophytic or parasitic. Holozoic nutrition can be seen in most vertebrates and some unicellular organisms like the amoeba. Saprophytic nutrition is where the organisms feed on dead and decaying matter. Examples include bacteria and fungi.
Using the figure, match the following
The muscle fiber (cell) is indicated by
Label A
Label B
Label C
Label D
Answer:
Hope it helps
Explanation:
The label A represents mitochondria.
The mitochondria are also called the powerhouse of the cell which converts glucose to energy-rich molecules of ATP.
Label B represents the nucleus.
The nucleus contains the genetic material or DNA, RNA, nucleolus, chromatin fibers, and proteins. It contains the chromosomes which control the hereditary characteristics.
Label C represents the lysosome.
Lysosomes contain digestive juices which break down large cell parts and large molecules and help in intracellular digestion.
Label D represents rough endoplasmic reticulum having ribosomes.
The rough endoplasmic reticulum provides a surface for protein synthesis. It is also used to transport cellular contents from one cell to another.
Give an example of physical evidence used to organize Earth’s history on the geologic time scale.
Answer:
The Earth is 4.6 billion years old. Some examples of events listed on the geologic time scale include the first appearance of plant life on Earth, the first appearance of animals on Earth, the formation of Earth's mountains, and the extinction of the dinosaurs.
Explanation:
please mark this answer as brainliest
Why are vestigial structures not removed by natural selection ?
Answer:
because natural selection only acts on traits that impact reproductive success.
Need help on this please!!!
Answer:
1. D
2. G
3. C
4. A
Explanation:
An endothermic reaction is one that absorbs or uses heat energy. Its polar — er thermal — opposite, exothermic describes a reaction that makes or gives off heat. It can be easy to confuse the two, but if you can remember that endo means “in” and exo means "out,". Ectotherm, any so-called cold-blooded animal—that is, any animal whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface. The ectotherms include the fishes, amphibians, reptiles, and invertebrates.
Larger animals can keep their heat for a longer time than smaller animals. A small animal has a greater surface area for its size compared to an adult animal. That is why small animal, as well as a baby, is more prone to heat loss. Larger animals can keep their heat for a longer time.
Who is the smartest man alive?
Answer: If its iq based then it would be William James
Explanation:
What do we call the area of Earth,
from the top of the highest mountain
to the bottom of the ocean, in which
all life exists?
A. atmosphere
B. life bubble
C. biosphere
Country A is rich in natural resources. These resources are evenly distributed across the country. Country B has resources concentrated at few places. The government of Country B is hindering the resource distribution due to vested interests. What could be a possible impact of this scenario?
A.
Country B will have high level of poverty.
B.
Country A will have high level of poverty.
C.
Country B will have low level of poverty.
D.
Country A and B both will have low level of poverty
Answer:
country b will have high level of poverty
what are the materials that are emitted during a volcanic eruption?
Answer:
The most common volcanic gases are water vapour, carbon dioxide, sulfur dioxide, and hydrogen sulfide. Small quantities of other volatile elements and compounds also are present, such as hydrogen, helium, nitrogen, hydrogen chloride, hydrogen fluoride, and mercury.
Describe how brine pools function
Explanation:
Brine pools are sometimes called sea floor "lakes" because the dense brine does not easily mix with overlying seawater. The high salinity raises the density of the brine, which creates a distinct surface and shoreline for the pool. When submarines dive into brine pools, they float on the brine surface due to the high density
Under certain conditions, it is possible to get more work out of a machine than you put into it.
Please select the best answer from the choices provided
T
F
Answer:
f :)
Explanation:
Which of the following is NOT TRUE about blood pressure?
A. It measures how much the blood is pressing against the vessels as it is pumped through
the system
B. It is affected by both genetic and environmental factors.
C. Hypotension indicates good health
D. hypertension indicates that your blood needs more pressure to be moved through the
veins
Answer:
c.Hypotension indicates good health
what body systems help when taking a test
Drag each label to the correct location on the image.
Classify the following actions as ethical or unethical actions.
Answer:
Ethical:
-Giving a sick cow antibiotics.
-Euthanizing a horse suffering from an incurable disease and pain.
Unethical:
-Disclosing medical records of a patient without consent from the pet owner.
-Concealing information about a genetic defect from a dog breader.
Explanation:
In the field of veterinary medicine, ethics is a set of moral norms and mandates of conduct for veterinarians in which the welfare of the animal and the prevention of its suffering are prioritized, at the same time as the search for clear and detailed information regarding the use of animals for different purposes, be they commercial or otherwise. Thus, any activity that prevents the suffering of an animal will be considered ethical, at the same time that any activity that produces immediate or future suffering to an animal will be considered unethical.
5) It is said that the hottest layer of the earth
is the core (outer core and the inner core)
and that is where metal is found. Why
can't metal melt in the core?
Answer:
please give me brainlist and follow
Explanation:
The churning metal of the outer core creates and sustains Earth's magnetic field. The hottest part of the core is actually the Bullen discontinuity, where temperatures reach 6,000° Celsius (10,800° Fahrenheit)—as hot as the surface of the sun. The inner core is a hot, dense ball of (mostly) iron.
Which process involves the deliberate alteration of an organism’s genetic material?
Answer:
recombinat DNA , epidemiology,
The initial velocity of an enzyme catalyzed reaction is determined by:_________.
a. graphically determining 1/2 Vmax.
b. calculating the amount of product formed over time while the amount of product is increasing in a linear manner.
c. calculating the amount of product formed over time from the beginning to the end of the reaction.
d. graphing the absorbances of known concentrations
Answer:
calculating the amount of product formed over time while the amount of product is increasing in a linear manner. ( B )
Explanation:
The initial velocity of an enzyme catalyzed reaction is determined by Calculating the amount of product formed over time while the amount of product is increasing in a linear manner
Initial Velocity of an enzyme is the described in relation to the amount of product produced per unit time at the beginning of a reaction.
The initial velocity of an enzyme reaction is determined by calculating the amount of product over time while it is increasing in a linear manner (Option B).
What is an enzyme?An enzyme is a protein that may act as a biological catalyst for a particular chemical reaction.
Enzymes work by speeding up the velocity of a given chemical reaction.The initial velocity of an enzyme can be calculated by determining the amount of product of the chemical reaction.In conclusion, the initial velocity of an enzyme reaction is determined by calculating the amount of product over time while it is increasing in a linear manner (Option B).
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Why is it important that gametes be haploid?
I GOT YOU SO EASY
Answer:because when the sperm and the egg fuse together the cell will have 46 chromosomes.
Answer:
It is important that chromosomes are haploids because when the sperm and the egg fuse together the cell will have 46 chromosomes. polar bodies are haploid cells produced during meiosis which are smaller in size compared to the gamete and will disintegrate
Explanation:
Hope this helped Mark BRAINLIEST!!!
In diagrams a full moon is represent with a
A. A white circle
B. A completely shaded circle
Answer:
A
Explanation:
cause you can see the entire moon at night(if there are no clouds present)
How does overpopulation harm a species?
A greater stability of the biosphere would most likely result from
O A. decreased finite resources
O B. increased deforestation
O C. increased biodiversity
O D. decreased consumer populations
Answer:
C
Explanation:
Increased biodiversity helps diminish reliance on one species
Greater stability of the biosphere would most likely result from increased biodiversity (Option C).
Biodiversity refers to the observable variation in the life forms in a given ecosystem.Biodiversity greatly contributes to maintaining the homeostasis (internal equilibrium) in an ecosystem.In consequence, the loss of biodiversity (often due to human activity) can lead to the collapse of the ecosystem.In conclusion, greater stability of the biosphere would most likely result from increased biodiversity (Option C).
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Help pls ;<; /A city lies near a forest. The city leaders decide the forest should be protected. There is a stream running through the forest, too. Which action would preservationists and conservationists agree on? A. Some fish can be caught in the stream. B. Fighting forest fires should be allowed. C. The forest and stream should be protected. D. Hunting shouldn’t be allowed in the forest. E. People should be allowed to camp in the forest.
Answer: fighting forest fires should be allowed
Explanation:
Answer: C: The forest and stream should be protected.
Explanation: