An ion must cross the cell membrane through active transport instead of passive when the ion is ...

a. negatively charged

b. carried across by a protein

c. going against the concentrate ingredient

d. to small to move independently

Example of how organisms that were previously thought of as related are actually more genetically related to organisms outside their species?

How does the brain and the nervous system assist in times of limited body resources?

Which are required for natural selection to occur

Which factors are included in watershed conservation? Check all that app protecting different kinds of wildlife restoring vegetation in certain areas preventing damage to crops from precipitation ensuring improvement of environmental health

According to Chargaff's rule, base pairing in DNA should resemble which of the following? A = T; C = G A = C; T = G A = G; T = U A = U; C = G

What is ATP, and when is energy released from it

Why do scientists classify fish, amphibians, reptiles, birds, and mammals together in one group?

In what part of cell does replication occur

What factors influence the impact a population has on its environment?

What kind of bonds form between the oxygen atoms of one water molecule and the hydrogen atoms of another water molecule