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Stells [14]
3 years ago
12

How are artificial selection and natural selection different? Select the best answer from the choices below.

Biology
2 answers:
rosijanka [135]3 years ago
8 0
D is the correct answer
OleMash [197]3 years ago
6 0
D. In artificial selection
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Describe how hibernation has helped bear species to survive.
Ierofanga [76]
Hibernation helps animals survive the changing seasons. Foods that bears eat, such as berries and flowers, are much less available during cold winter months. When they hibernate, bears enter a deep sleep. ... While they sleep, the bears can survive because their bodies live off of their stored fat or food.

During hibernation, the animal’s body temperature, heart rate and breathing rate all drop to significantly lower levels. Animals do this to survive the winter because the weather is cold and food is scarce. It is advantageous because these animals can quite literally shut themselves off for weeks at a time rather than try and survive through harsh weather conditions.

While many people think bears are hibernators, they actually participate in a similar, though not exact, practice. Instead of hibernating, bears fall into a deep sleep called torpor. During torpor, heart rate and breathing rate decreases, body temperature reduces slightly and bears do not eat or release bodily waste. Bears can sleep more than 100 days without eating, drinking, or passing waste!

Bears sleep in dens that they make themselves, as well as in hollow trees, caves and dens built by other bears. A den can be built in 3–7 days, however, the timing of den building varies from bear to bear. While some bears build their dens months before hibernation season, others choose to excavate their dens.

These animals can dramatically drop their body temperature to below freezing—salty body fluids work to prevent tissue crystallization in particularly cold temperatures.

So really, animals that are true hibernators don’t actually sleep through the entire winter.

The urea produced by their fat metabolism is broken down and the nitrogen is re-used by the bear to rebuild protein.
6 0
2 years ago
Read 2 more answers
Which of the following shows the correct progression of organisms on the planet?
Misha Larkins [42]

Answer:

B

Explanation:

7 0
3 years ago
діти з синдромом дауна мають ті ж алелі що і батьки у чому ж тоді причина настільки суттєвих відмінностей у будові та функціонув
Anit [1.1K]

Answer:May you please translate that into english

Explanation:

4 0
3 years ago
A scientist observes changes in a population of slow-moving animals over time. She hypothesizes that the population may be decre
Sergeeva-Olga [200]
<h2>Scientist Observing changes </h2>

If the population of the species is significantly decreasing then the species could become extinct. The decline in population is due to some factors like less immigration, aging, and decreasing fertility rates. But the most is due to less immigration which causes to decrease population. The extinction of population can be prevented by some serious actions which should be taken government.

8 0
3 years ago
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What is the effect of uneven heating of the earth's surface on the environment ​
zhannawk [14.2K]

When people speak about convection, they are usually referring to the uneven heating that occurs on the surface of the earth.

Consequences of an inconsistent heating system:

Because of the disparity in temperature distribution, certain areas of the environment are hotter than others, and there are also shifts in volume and tension as a result.

It generates updrafts, which in turn may lead to thunderstorms and other types of severe weather.

The Earth has moved slightly on its axis.

Because the sun's rays are directed directly at the equator, the temperature there is higher than in other parts of the planet.

As you approach farther north or further south of the equator, they drop down in an incline or at an angle.

Because of this, the temperature of the earth is uneven, which in turn shapes the wind and the flow of the sea and makes it possible for life to exist.

To know more about thunderstorms click on the below link:

brainly.com/question/6838263

#SPJ4

3 0
1 year ago
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