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3 years ago

Which of the following is most easily changed to alter resistance?

Biology

1 answer:

Leya [2.2K]3 years ago

7 0

Answer:

Answer is C.

Explanation:

A. The vessel length is pretty much constant. The body can't length or shorten blood vessels.

B. Blood viscosity is also fairly constant because the composition of blood cannot change quickly enough to change resistance as needed.

C. This is the main way resistance is controlled. The smooth muscle surrounding blood vessels can rapidly respond to hormonal or metabolic stimuli and contract/relax to adjust diameter.

D. Again, temperature is fairly constant in the body and would not be a good way to alter resistance.

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Cattle depend on microorganisms in their digestive tract to digest the cellulose in their diets. The cattle and the microorganis

GaryK [48]

<h2>The correct answer is: Mutualism.</h2>

Explanation:

Mutualism can be defined as a type of symbiotic relationship.
Symbiosis can be defined as the type of ecological interplay in between two species localized in the same habitat in which at least one of the species gets benefited in the form of food, shelter or protection due to the interaction.
Mutualism is a type of positive symbiosis in which both the species involved in the ecological interplay benefits due to the interaction in between them.
In the given question, some micro-organisms survive in the digestive tract of the cattle.
These micro-organisms produce the enzyme, cellulase, which helps in digesting cellulose present in the food consumed by the cattle.
The cattle is incapable of producing this cellulase enzyme by itself and is dependent on the micro-organisms for its synthesis.
Hence, the the micro-organisms help the cattle in obtaining nutrition and energy by the digestion of cellulose.
On the other hand, the micro-organisms get shelter, nutrition and protection in the gut of the cattle.

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3 years ago

Where can the following organelle be found: Mitochondria. Also if it a multiple choice.

xxMikexx [17]

Answer:

all of them

Explanation:

Mitochondria are found in the cells of nearly every eukaryotic organism, including plants and animals. Cells that require a lot of energy, such as muscle cells, can contain hundreds or thousands of mitochondria.

BUT EACH CELL HAS A DEFINING TRAIT ABOUT THEM

-PROKARYOTIC-no nucleus

-PLANTS- cell wall. large central vacuole

-ANIMALS-multicellular might have more than one mitochondria

3 0

3 years ago

what loop prepares the body for change. This is in contrast to a feedback loop that a. brings a parameter back into the set rang

11Alexandr11 [23.1K]

Answer:

The correct answer is - negative feedback loop.

Explanation:

A negative feedback loop takes place in the biology when the end product of a particular reaction leads to decrease in the reaction. A negative feedback loop makes system to bring the homeostasis.

Negative feedback loops takes place inside the body of an individual to decrease the function of a particular reaction, it prepared the body for the change that occur in the atmosphere such as pH, temperature and other.

Thus, the correct answer is - negative feedback loop.

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3 years ago

A population of bacteria is treated with hand sanitizer. Because of genetic variation in the population, what is the possible ou

velikii [3]

Answer:

D. Some of the bacteria may be resistant and survive.

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3 years ago

as hominids evolved, their litter sizes decreased and their gestation period increased. which of the following inferences can be

yarga [219]

That the hominids evolved with an increase in development within the womb and became more of a quality over quantity species

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3 years ago