The entrance into the cavity formed during gastrulation in sea stars and frogs is called the
a. archenteron.
b. blastocoel.
c. blastocyst.
d. blastopore.
c
Biology & Microbiology
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ACTH (corticotropin)
a. is secreted by the posterior pituitary. b. has target cells in the autonomic nervous system. c. has target cells in the adrenal glands d. has target cells in the adrenal medulla. e. initiates the autoimmune response.
Biology & Microbiology
Precipitation on a tropical island is greatest during June to August and lowest during January to April. This island must be located south of the equator
Indicate whether the statement is true or false
Biology & Microbiology
Testcrosses are used to determine the genotype of an organism.
a. true b. false
Biology & Microbiology
Eukaryotic chromosomes contain a single DNA replication origin." This statement is
a. true b. false
Biology & Microbiology