Based on the Mayr definition of a biological species, bacteria cannot be classified as a species for which reason?
A. The DNA sequences of all bacteria are more than 97% identical.
B. Bacteria are present everywhere and cannot be reproductively isolated from other bacteria.
C. Bacteria cannot reproduce.
D. Bacteria do not evolve.
E. Bacteria are asexual.
E. Bacteria are asexual.
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A biologist discovered a new animal. Upon studying its embryonic development, she observed radial cleavage with the blastopore developing into an anus. This animal was categorized as a
A. parazoan. B. radiata. C. deuterostome. D. protostome. E. pseudocoelomate.
What pigments are present in the samples derived from individuals that are homozygous dominant (AA) for shell color?
a. Red and grey b. Yellow and grey c. Red and yellow d. Red, yellow, and grey
Laboratory simulations provide indirect evidence that organic compounds such as __________ and __________ selfassemble
spontaneously under conditions like those thought to have prevailed on the early Earth. Fill in the blank(s) with the appropriate word(s).
Most microbes are in the environment
What will be an ideal response?