On a phylogenetic tree, what do the branch lengths represent?
1 point
The age of the organisms
amount of genetic change since divergence
amount of genetic change since convergence
The age of divergence

How does natural selection change thephenotypes within a population over time?

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.