Carbohydrates ____
a. act as energy sources for cells
b. include fats and oils
c. are made of nucleic acids
d. act as protein builders
e. are also called steroids
ANSWER: a
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Which of the following couplets DOES NOT give the correct kinds of insects contained in the Order?
A. Coleoptera: beetles B. Lepidoptera: grasshoppers C. Diptera: flies D. Hemiptera: bugs E. Hymenoptera: ants, bees, and wasps
Gravitropism is based on feedback from which of the following plant structures?
a. vine tendrils b. phototropins c. all of the choices d. statoliths
Look at the illustration and think about what you have learned about the regulation of the cell cycle. If Rb were mutated and could not be phosphorylated or bind E2F, which would be a possible outcome?
a. E2F would bind and transcription would proceed.
b. Rb would block transcription and apoptosis would be triggered.
c. Cancer would result due to unchecked cell growth and mitosis.
d. Transcription would be blocked and the cell cycle could not proceed.
Which of the following statements is correct?
a. Intracellular digestion is seen in mammals. b. Intracellular digestion never involves choanocytes. c. Extracellular digestion must involve choanocytes. d. Extracellular digestion may take place in a tube contained inside the body. e. Most animals experience both intracellular and extracellular digestion.