The oil from the sebaceous glands is produced by which of the following cell organelles?
A) ribosomes
B) the rough endoplasmic reticulum
C) the cell membrane
D) the smooth endoplasmic reticulum
Answer: D
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One reason food is refrigerated to control microbial growth is because irreversible cell damage is more likely to occur at low rather than high temperatures
Indicate whether the statement is true or false.
The theory illustrated by the accompanying figure is used to explain the origin of which organisms?
a. anaerobes
b. eukaryotes
c. prokaryotes
d. protobionts
e. vascular plants
Agarose is added to solidify the gel. It then acts as a filter, allowing only smaller particles to pass through quickly. Larger molecules are slowed by this and do not move as fast or far through the gel.
What will be an ideal response?
Mollusk eyes and vertebrate eyes are
A. analogous structures, because they have the same function but derive from different common ancestors. B. homologous structures, because they are derived from the same common ancestor. C. homologous structures, because they have different functions. D. analogous structures, because they arise from the same structures during development.