During the development following fertilization, the morula becomes a hollow ball of cells called the
A) conceptus.
B) fetus.
C) germ layer.
D) blastocyst.
E) secondary morula.
D
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At rest, a nerve cell has a high concentration of
__________ inside and a high concentration of __________ outside. a. acetylcholine; chlorine b. sodium; potassium c. potassium; sodium d. calcium; phosphorous e. phosphorus; calcium
Strength training involves ____
a. activities like jogging and swimming b. intense, short duration activity c. decreased number of myofibrils d. recruiting more enzymes in aerobic activity e. producing muscles with higher endurance
What process occurs as individual water molecules move fast enough to rise into the air as water vapor?
A) condensation B) combustion C) evaporation D) precipitation
Since 1750, the main cause of increased carbon dioxide being released into the atmosphere is:
a. the burning of fossil fuels such as coal and gasoline. b. the burning of wood. c. cattle production. d. erosion. e. decomposition.