Which of the following best describes substances that enter a plant through the root system?
A) They are dissolved in water.
B) They are obtained from the air.
C) They are organic molecules.
D) They are brought in through stomata.
A
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A ________ genome exists as several separate, nonidentical molecules that may be packaged together or separately.
A. diploid B. fractionated C. polyploid D. segmented
The major predators of giant squid are:
a. gulper eels. b. sperm whales. c. giant octopus. d. vampire squid. e. viper fish.
Normal genes that code for proteins that act in cell division are ____________________. Fill in the blank(s) with the appropriate word(s)
Which statement best summarizes the difference between ectothermic and endothermic organisms?
A) Ectotherms are warm-blooded, but endotherms are cold-blooded. B) Endotherms control their temperature, but ectotherms have no control over their temperature. C) Ectotherms absorb external heat, but endotherms use metabolic heat to maintain a warm, steady body temperature.