What do scientists use to apply cladistics?
a. homologous traits
b. homoplasies
c. analogous traits
d. monophyletic groups
Answer: a. homologous traits
Biology & Microbiology
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Due to the directionality of polymer synthesis, proteins have distinct ________ and ________ ends.
Fill in the blank(s) with the appropriate word(s).
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The main regulator of the calcium level in the blood is
a. parathyroid hormone. b. thyroid hormone. c. thymosin. d. growth hormone. e. insulin.
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In Drosophila, the sex of an individual is determined by
A. 1 pair of alleles. B. 2 pairs of alleles. C. 1 pair of autosomes. D. the number of X chromosomes. E. the number of Y chromosomes.
Biology & Microbiology
The phylum of animals that does not show true tissues or symmetry is:
A) Cnidaria. B) Porifera. C) Platyhelminthes. D) Annelida. E) Nematoda.
Biology & Microbiology