Part a
climax community always
describes aquatic biomes
describes terrestrial biomes
iomes
is typical of the first stages of secondary succession
has the lowest biodiversity of all stages of succession
remains in place until a disturbance restarts succession
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Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.

All phases of matter may have a fixed mass

Ineed a little . why do you think there is a basic difference between the kinds of fertilization most common in aquatic and terrestrial animals?