A phylogenetic tree is a diagram that describes a phylogeny. A phylogeny is
A. the evolutionary history of a species or group of species.
B. the geographic distribution of populations in a species.
C. the generations of individuals in a population.
D. the distribution of species in a given area in time.
E. a list of character traits of individual species set in a tree diagram.
A. the evolutionary history of a species or group of species.
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Animals with a crown of cilia that look like a spinning wheel are the:A
bryozoans. B. phoronids. C. ctenophores. D. rotifers. E. platyhelminthes.
During the cell cycle, DNA replicates during the late G1 phase
Indicate whether the statement is true or false
Cytotoxic T cells are best characterized by the following cell-surface marker
A. CD4 B. CD8 C. CD3 D. CD2
Identify the conversion which represents nitrification.
A - Nitrite to nitrate to nitrogen to ammonia B - Nitrate to nitrite to ammonia to nitrogen C - Nitrogen to ammonia to nitrite to nitrate D - Ammonia to nitrate to nitrite to nitrogen