The vertebrate ectoderm is the origin of the _____
A) nervous system
B) liver
C) pancreas
D) heart
E) kidneys
Answer: A
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What is an example of a molecule that can act as both a neurotransmitter and a hormone?
A. estrogen B. progesterone C. thyroxine D. norepinephrine E. insulin
Which of the following can make it easier to see the internal parts of a cell through a light microscope?
a. Beams of electrons b. Stronger lenses c. Direct source of natural light d. Special stains
The formation of fat from excess glucose is called ____
Fill in the blank(s) with the appropriate word(s).
A bacterial chromosome consists of:
a. a linear DNA molecule many times larger than the cell. b. a circular DNA molecule many times larger than the cell. c. a circular DNA molecule smaller than the cell. d. a linear DNA molecule smaller than the cell. e. a linear or circular DNA molecule smaller than the cell.