The difference between DNA transcription and DNA replication is _____.
A) transcription uses the enzyme RNA polymerase
B) replication uses the entire DNA strand as a template
C) replication produces a double helix
D) all of the choices
Answer: D) all of the choices
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Refer to the accompanying figure. Recall that eggs from the same female were exposed to each of the eight treatments used. This aspect of the experimental design tested which of the following hypotheses?
A) The longer day lengths of summer trigger the development of twig-like caterpillars. B) Differences in air pressure, due to elevation, trigger the development of different types of caterpillars. C) Differences in diet trigger the development of different types of caterpillars. D) The differences are genetic. A female will either produce all flowerlike caterpillars or all twig-like caterpillars.
What is the process responsible for creating distinct, separate structures during embryological development, such as the toes visible in this image?
a. signal cascade
b. meiosis
c. apoptosis
d. signal transduction
A balloon inflated with helium is able to float toward the ceiling because
What will be an ideal response?
Skeletal muscles act by _______________.
A. pulling on bones in opposing pairs. B. pushing and pulling on bones in antagonistic pairs. C. pulling on other muscles in a coordinated fashion. D. contraction against a fluid-filled cavity. E. functioning as a lever.