The most abundant plankton are the:
a. phytoplankton.
b. bacterioplankton.
c. viriplankton.
d. zooplankton.
e. macroplankton.
C
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B cells undergo ____ , where a specific cell will divide in response to its associated antibody recognizing an antigen
Fill in the blank with the appropriate word.
Luteinizing hormone (LH) and follicle-stimulating hormone (FSH) are
a. constantly secreted into the bloodstream of males. b. produced in both male and female humans. c. produced in the ovaries. d. produced in the testes. e. only produced in female humans.
Muscles can only __________ on bones, never __________
Fill in the blank(s) with the appropriate word(s).
Answer the following questions true (T) or false (F)
1. Hypothalamic neurons directly control the anterior pituitary with neural stimuli at a synapse. 2. Most of the hormones of the anterior pituitary control other endocrine glands. 3. Follicle-stimulating hormone stimulates thyroid gland follicles to produce T4.