The function of the cell type labeled 3 in Figure 43-5 is:
a. to detect shape and movement.
b. to receive messages from the bipolar cells.
c. to receive input from the receptor cells.
d. to stimulate the ganglion cells.
e. to send a neural impulse to the brain
C
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Each intact ribosome consists of a large and a small subunit made mostly of catalytic rRNA. A ribosome also consists of:
a. structural proteins b. free amino acids c. DNA d. lipids e. enzymatic proteins
Mammal-like reptiles arose during which time period?
a. Triassic period b. Cambrian period c. Devonian period d. Cretaceous period e. Carboniferous period
Which of the following is NOT a feature shared by all animal respiratory surfaces?
A) They are thin. B) They have a large surface area. C) They are moist. D) They are associated with a capillary bed.
Which of these characteristics does not promote outcrossing in flowering plants?
A. monoecism B. self-incompatibility C. physical separation of flower parts D. apomixis E. dioecism