The ____ in the human body regulates hunger and satiety (a sense of fullness)
a. hypothalamus
b. liver
c. pancreas
d. small intestine
e. stomach
ANSWER: a
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A mutation in a promoter region that causes the promoter sequence to more closely resemble the consensus sequence is called an up promoter mutation and results in a decrease in transcription
Indicate whether the statement is true or false
How do water molds differ from true fungi?
a. Water molds have cell walls made up of chitin; fungi have cell walls made up of cellulose. b. Water molds form hyphae; fungi form mycelia. c. Water molds are haploid; fungi are diploid. d. Water molds have a flagellated stage in their life cycle; fungi do not. e. Water molds do not cause plant diseases; fungi do.
The cuticle of a plant functions primarily for ____
a. retention of water b. conduction of water and minerals c. absorption of oxygen d. photosynthesis e. structural support
When the size of a cell increases, the surface area/volume ratio
A) decreases initially and then begins to increase. B) remains the same. C) decreases. D) increases initially and then begins to decrease. E) increases.