One way embryonic cells can learn their position in an embryo is by detecting the concentration of a
A. morphogen
B. DNA polymerase
C. gene (segment of DNA) encoding a transcription factor
Answer: A. morphogen
Biology & Microbiology
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Based on the morphological species concept, why would you assume that there are many different species of rat
snakes?
What will be an ideal response?
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Which of these muscles would you expect to have the greatest proportion of slow-twitch fibers?
A. the lateral rectus B. chicken breast muscle C. the soleus D. the gastrocnemius
Biology & Microbiology
A single atom of carbon may form up to ____ covalent bonds with other atoms
a. two b. three c. four d. five e. six
Biology & Microbiology
Which of the following biological molecules are composed of monomer units containing a sugar, a phosphate group, and a nitrogen-containing base?
A) Proteins B) Lipids C) Nucleic acids D) Carbohydrates
Biology & Microbiology