Which plant family includes cereal grains, such as wheat, corn, rice, and oats?
a. grass family (Poaceae)
b. pea family (Fabaceae)
c. potato family (Solanaceae)
d. rose family (Rosaceae)
e. euphorb family (Euphorbiaceae)
ANSWER: a
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Antibodies enhance ____ of bacteria and viruses because cells, such as macrophages, have receptors on their surfaces
that recognize the ____ end of antibodies.
a. phagocytosis; heavy-chain b. phagocytosis; antigen-binding c. neutralization; heavy-chain d. neutralization; light-chain e. phagocytosis; light-chain
How many land eco-regions have been
identified by the World Wildlife Fund as top priorities for conservation efforts?
a. 123 b. 167 c. 456 d. 579 e. 867
What is the evaporation of water from plant tissues called?
a. guttation b. root pressure c. transpiration d. cohesion-tension
Based on what scientists have observed about all living things on Earth, what must be true of something found in space for it to be considered living?
A) It must have one or more organelles. B) It must be composed of one or more cells. C) It must be able to move from place to place. D) It must contain a nucleus.