The answer is D<span>. Cell walls are made of cellulose. Cell membranes are made of proteins and phospholipids
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Answer:
Radiation from the lamp reaches the soil and causes the soil to warm
Answer:
B
Explanation:
The Earth is tilted 23.5 degrees on its vertical axis. During the northern hemisphere's spring and summer, the northern hemisphere is tilted towards the Sun.
This has happened before in Yellow Stone National Park in CA. Removing a species form the Pyramid causes the ecosystem to collapse, as species become over hunted and others are starved. One type of organism could become overpopulated, therefor lack of natural variation.
