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defon
3 years ago
7

One possible reason why polar bears might not be able to survive if the environment they live in changes is because

Biology
1 answer:
swat323 years ago
5 0
Polar bears are animals that live in cold environments. Their environment should be a place conducive for breeding and propagating their species. If ice caps are melting and the length of the cold season is declining because of the effects of climate change, polar bears will have less time hunting for food. Generally, the coldest season is the best hunting time for polar bears. It is easier to catch seals and fish due to the thickness of the ice and the rise of water in their environment. This time to hunt is enough to restore the polar bears’ body fat and fitness in preparation for the warm season where there is less ice and food. <span>As the warm season lengthens, the condition of the polar bears’ bodies decline resulting to effects that are serious for pregnant polar bears who are nursing and cubs who need their mothers’ energies to survive the harsh environment. </span>
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A positive feedback loop causes a self amplifying cycle in which a physiological change leads to even greater change in the same
iVinArrow [24]

The given statement is TRUE.

A positive feedback loop causes a self amplifying cycle in which a physiological change leads to even greater change in the same direction.

A negative feedback loop is a process in which the body senses a change, and activates mechanisms to reverse that change.

What is a positive feedback loop?

In nature, a positive feedback loop happens when the outcome of a reaction increases that reaction. A positive feedback loop pushes a system further away from the equilibrium goal if we consider a system in homeostasis. It takes place when something needs to happen quickly and does this by enhancing the effects of a product or event.

<u>Example</u> : Ripening of fruit

In nature, there is a strange phenomenon when a tree or bush may suddenly and silently begin to ripen all of its fruit or veggies. This is the first instance of a beneficial biological feedback loop we've found. If we see an apple tree with many apples, they all appear to ripen over night, going from being unripe to ripe to overripe. The first apple to ripen will mark the start of this. It releases ethylene (C2H4) via its skin when it is ripe. The apples nearby ripen as a result of being exposed to this gas. As soon as they are ripe, they too begin to generate ethylene, which continues to ripen the rest of the tree in a manner akin to a wave.

To know more about positive feedback loop click on the link below:

brainly.com/question/19911791

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8 0
1 year ago
What consumer level is a lobster
Alexeev081 [22]

The lobster would be a secondary consumer.

3 0
3 years ago
What do scientists often use to study macro evolution?
Sladkaya [172]

Answer:

Fossil record is used to study macro evolution.

Explanation:

Macroevolution may be defined as the change above the species level.  Fossils are the impressions of dead plants and animals buried under the surface of rocks.

Fossils provide the direct evidence of macroevolution. For example : Paleozoic era was dominated by trilobites, crinoids and brachiopods. Rocks that one part of paleozoic era are now contains the fossils of trilobites, crinoids and brachiopods. These species may either extinct or not common in today's world. Thus, fossil record can be used to study macroevolution.

6 0
3 years ago
Read 2 more answers
Platelet accumulation is __________ until the wound opening is completely covered by a cluster of platelets resulting in what is
dezoksy [38]

Answer:

The correct answer is - augmented.

Explanation:

Platelet plug formation takes place when there is an injury and it is the solution for the that occurs after the blood vessels vasoconstriction, it is resulted by the platelet accumulation or coagulation o the blood.

Platelet accumulation is augmented until the would or op[en injury is completely covered by fibrin mesh or cluster of platelets. This process is called a platelet plug.

Thus, the correct answer is - augmented.

6 0
3 years ago
How will the body benefit from the movement of the rib cage when breathing?
alisha [4.7K]
When you breathe your diaphragm contracts and moves downwards. This increases the space in your chest cavity, and it allows your lungs to expand into it. This is beneficial because it decreases pressure and drives air into our lungs
4 0
3 years ago
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