When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus; therefore, you conclude that the cell must be a type of __________ cell.
A) plant
B) eukaryotic
C) fungal
D) prokaryotic
Answer: D) prokaryotic
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Answer the question using the accompanying figure. Many ____ act via the signaling fashion illustrated by this figure
a. neurohormones b. digestive hormones c. stress hormones d. blood sugar regulatorsc e. growth factors
Effector B cells secrete antibodies that are ____ those produced by the original B cell from which they arose, which
then ____.
a. identical to; flag antigens for phagocytosis and prevent them from attaching to body cells b. different than; help antigens attach to body cells c. identical; prevent antigens from clumping together to d. different than; present them on the surface of dendritic cells e. in addition to; flag antigens for elimination by urination
The kidneys interact with every other organ system of the human body in maintaining homeostasis.
Answer the following statement true (T) or false (F)
A team of scientists has devised a new chemical fertilizer that its members believe will increase crop yields. The team planted three garden plots with corn. The soil was similar in each, and equal amounts of water were applied to each plot. One plot was treated with a common commercial fertilizer, another was treated with the new fertilizer, and the third plot was not given any fertilizer. The experimenters measured yields as bushels of corn from each plot. The plot that did not receive fertilizer was the __________.
Fill in the blank(s) with the appropriate word(s).