The posterior portion of the neural tube will develop into the frog's
A) spinal cord.
B) brain.
C) blastocoel.
D) digestive tract.
E) anus.
Answer: A) spinal cord.
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In the male reproductive system, the ____________________ secretes a milky, alkaline fluid that neutralizes acidic vaginal secretions and enhances sperm viability
Fill in the blank(s) with correct word
In the cAMP pathway, the G protein activates ____
a. adenylyl cyclase b. diacylglycerol c. phospholipase C d. inositol triphosphate e. phosphodiesterase
According to Chargaff’s rules:a
the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules. b. the adenine content in any DNA molecule is always equal to the thymine content. c. the adenine content in any DNA molecule is always greater than the thymine content. d. the guanine content in any DNA molecule is always less than the cytosine content. e. there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule.
Bacteria that are unable to synthesize tryptophan are referred to as ________.
A) prototrophs B) auxotrophic for tryptophan C) auxotrophic for histidine