Why are the rain forest considered hot spots

In most stable freshwater environments, populations of Daphnia are almost entirely female and reproduce asexually. However, males are observed in low oxygen environments or when food is scarce.

Cell boundary that controls what enters and leaves the cell

Science test 1. How do some hormones affect only certain cells in the body but not others? Only cells having specific receptors for a hormone can respond to the hormone's presence. The hormones only go to some cells in the body but not to others.

Is it true that the breakup of Pangea caused climate changes that caused organisms to adapt or die off, this occured during the Paleozoic era.

13. Water and fats don't mix well because fats are

Which of the following is the most likely cause of succession in ecosystems? a. arrival of new species b. rain c. loss of an animal species d. wildfires

What agents of erosion are assisted by the force of gravity

Which of the following sense organs responds to chemical stimuli? a. eyes c. ears b. taste buds d. pain receptors

What is the interaction between mosquitoes an human beings called?

Which of the following is similar among all living organisms on Earth? cellular function social behavior physical appearance all of these