Cells that have a crawling movement include (select all correct choices):
A. amoebas foraging for food.
B. white blood cells in pursuit of invading
pathogens.
C. migrating embryonic cells.
D. nerve cells transporting neurotransmitters.
E. contracting muscle cells.
A,B,C
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The umbilical cord functions to
a. carry waste products in the blood from the fetus to the mother. b. carry waste products in the blood from the mother to the fetus. c. carry oxygen in the blood from the mother to the fetus. d. do both a and c.
A surge in which hormone is responsible for ovulation?
A) estrogen B) FSH C) LH D) progesterone
Even though the steps of photosynthesis that actually produce sugar molecules are part of the carbon fixation reactions, the light-dependent reactions are absolutely essential for sugar synthesis. Explain the role of the light-dependent
reactions in the formation of the end products of photosynthesis. What will be an ideal response?
Nosocomial infections are acquired in a hospital from surgical procedures, equipment, personnel, and often involve drug resistant microorganisms.
a. true b. false