Which statement best explains how enzymes speed up chemical reactions? Question 12 options:

A.) Enzymes use light energy to speed up chemical reactions.

B.) Enzymes gain heat from chemical reactions.

C.) Enzymes change shape during chemical reactions.

D.) Enzymes lower the activation energy of a reaction.

All ova contain sex chromosomes corresponding to: x y xx xy

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection

Support mangrove trees out of the water. a) pneumatophores b) prop roots c) sand dunes d) tide supports