Alternation of generations in plants refers to the alternation of:
a. meiotic and mitotic stages.
b. diploid and haploid stages.
c. male and female stages.
d. spore and seed stages.
e. thallus and leaf stages
b
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The process whereby toxins are actively taken up by an organism is called:
a. additive affect. b. bioaccumulation. c. trophic dynamics. d. predator-prey relationships. e. adsorption onto seston.
Which of the following is true of vitamins?
a. they are inorganic substances needed in small amounts b. fat-soluble vitamins include C and B vitamins c. they are stored in body fat d. large amounts of vitamin K during pregnancy can cause birth defects e. taking large amounts of vitamin D can cause death
A cell is limited in its size by ________
A) its ability to move waste material out B) its surface-to-volume ratio C) its ability to move nutrients in D) All of the above are correct.
Which of the following is an iron-binding protein produced by pathogens to access the body's store of iron?
A) gastroferritin B) lactoferrin C) ferritin D) transferrin E) siderophores