Refer to the accompanying figure. Which structure gives rise to the spinal cord?

a. 1
b. 2
c. 5
d. 8
e. 9


d

Biology & Microbiology

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A new nucleotide can only be added to the ____ of a growing DNA strand. DNA therefore always grows in the _____ direction

A. 3'; 5' to 3' B. 5'; 5' to 3' C. 3'; 3' to 5' D. 5'; 3' to 5'

Biology & Microbiology

What kind of symbiosis occurs between bioluminescent bacteria and its host?

a. Commensalism b. Mutualistic c. None of these choices d. Parasitism

Biology & Microbiology

Conduction

What will be an ideal response?

Biology & Microbiology

In the blood clotting process, platelets arrive at the site of damage and start secreting substances to attract more platelets. More platelets arrive at the site and secrete attractants to recruit more platelets. This is an example of:

A. positive feedback. B. negative feedback. C. electrical signaling. D. feedforward regulation.

Biology & Microbiology