Larval salamanders tend to consume their insect prey whole. Thus, they are __________
a. bulk feeders
b. filter feeders
c. fluid feeders
d. omnivores
A
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Scientists isolate cells in various phases of the cell cycle. They find a group of cells that have times more DNA than G1 phase cells. The cells of this group are _____
A) between the G1 and S phases in the cell cycle B) in the G2 phase of the cell cycle C) in the M phase of the cell cycle D) in the S phase of the cell cycle
Which of the following transcription factors is present at the highest concentration in the eve stripe 2 region of the fruit fly?
A. bicoid B. Hunchback C. Krüppel D. Giant
Classical conditioning differs from operant conditioning in that classical conditioning associates ____
while operant conditioning links ____.
a. two phenomena that are usually unrelated; a voluntary activity with a reward b. a response with punishment; a response with a reward c. instinctive behaviors with punishments; learned behaviors with rewards d. a voluntary activity with a reward; two phenomena that are usually unrelated e. learned behaviors with rewards; instinctive behaviors with rewards
According to Darwin, natural selection is based on the ____ found in populations
a. acquired characters b. variations c. weakest members d. noncompetitors e. similarities