A molecular clock uses mutation rates in DNA to estimate the time that two species have
A) living together
B) comparing mutations
C) coevolving
D) evolving independently

Which of the following statements is true of enzymes? a)they dont provide an active site for substrates to bind in a reaction b)they act on a specific type of substrate in a reaction c)they unusable after a reaction d)they change shape after a reaction

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids