If we wanted to examine the effect of a fertilizer on the size of zucchini produced, we would need to
establish both experimental and control groups. The control group for this experiment would be
defined by the following conditions:a.
soil, fertilizer, water, sun, and no zucchini seeds.
b. soil, fertilizer, water, sun, and zucchini seeds.
c. soil, water, sun, and no zucchini seeds.
d. soil, water, sun, and zucchini seeds.
e. soil, water, and sun.
D
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Vascular plants and air-breathing animals first appeared during which time period?
a. Silurian period b. Permian period c. Cambrian period d. Ordovician period e. Cretaceous period
Which of the following is the proper sequence in
clotting? a. prothrombin, fibrinogen, fibrin, thrombin, clot b. prothrombin, fibrin, fibrinogen, thrombin, clot c. prothrombin, thrombin, fibrinogen, fibrin, clot d. thrombin, prothrombin, fibrin, fibrinogen, clot e. none of these
Fermentation
a. may occur in a muscle under anaerobic conditions. b. produces more ATP than is liberated in the hydrogen transfer series. c. breaks down glucose in reaction with oxygen. d. is restricted to yeasts. e. does none of these.
A coral reef is a complex _____ of calcium carbonate shells that are home to microbes, algae, invertebrates, and fishes.
A. ecosystem B. community C. biome D. population E. niche