BIOLOGY HIGH SCHOOL

Explain how life history traits vary with environmental conditions and with population density

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Answer 1
Answer: They vary on shape reproduction patterns in species. Traits that affect a organism's schedule of reproduction, selective pressures vary so life histories are very diverse. Life history traits are products of natural selection and an organisms life history comprises the traits that affect schedule of reproduction and survival, and also the traits are evolutionary outcomes reflected in the envelopment, physiology and behavior.

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HIGH SCHOOL

Acid rain has a greater effect on lakes without limestone because limestone is

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The presence of limestone and other calcium carbonate rock in lakes and streams helps to maintain a constant pH because the minerals react with the excess acid. However, acid rain eventually can overcome the buffering capacity of the surface water.

HIGH SCHOOL

What do plants do with most of the oxygen produced in photosynthesis?

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Answer:

By using the energy of sunlight, plants can convert carbon dioxide and water into carbohydrates and oxygen in a process called photosynthesis. As photosynthesis requires sunlight, this process only happens during the day. We often like to think of this as plants `breathing in carbon dioxide and breathing out oxygen.

MIDDLE SCHOOL

How do substances move in active transport

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There are a few types of active transport, but if we're talking about the sodium potassium pump for example, we know that for movement of this type, we need energy in the form of ATP (adenosine triphosphate) which has also been called the energy currency of the body. This gets broken down and then enables for different substances to move in and out of the cell membrane (this is just one example of active transport). 
Good thing I just studied this :)

Active Transport: Active transport requires energy. Imagine water moving UP a mountain. It takes energy. Passive transport doesn't require energy. Imagine water moving DOWN a mountain.
HIGH SCHOOL

A cell entering mitosis with a total of 48 chromosomes (24 pairs) will produce two cells, each with a total of __________ chromosomes.

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Okay so if you divide 4 with 3 you will get 55 so the answer should be 70 
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