The site of gravity reception in roots is the:a
root apical meristem.
b. periderm.
c. root epidermis.
d. root cap.
e. root hair.
D
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The antibody active in agglutination or clumping of antigens is that determine blood groups. This antipody is a pentamer and it is found in the blood and the lymph.
A) IgA B) IgM C) IgG D) IgD
Which group has the highest production efficiency?
A) mice B) voles C) insects D) fish
When a repressor binds to the operator site on the DNA it normally ________.
A. has no effect on transcription B. terminates transcription that has already been initiated C. inhibits the initiation of transcription D. reduces the rate of transcription
"Artery" and "vein" are defined by whether they leave or enter the heart. If they were defined by whether they carried oxygenated or deoxygenated blood, we would have to change the name(s) of
Select one: a. the hepatic portal vein to a hepatic portal artery. b. the hepatic and renal systems (they would have to be switched). c. the pulmonary artery and vein (they would have to be switched). d. the coronary artery and vein (they would have to be switched). e. the aorta and vena cava.