Sharing of electrons between 2 atoms forms a(n)
A. hydrogen bond.
B. ionic bond.
C. covalent bond.
D. strong bond.
E. covalent bond AND strong bond.
E
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Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Sensitivity B. Energy utilization C. Cellular organization D. Homeostasis E. Evolutionary adaptation
The close proximity of capillaries to the alveoli in lungs improve respiratory efficiency by ______.
A. decreasing the distance for diffusion B. changing the diffusion constant C. increasing the concentration difference D. increasing the surface area for diffusion
Which of the following extraembryonic membranes
forms fingerlike projections that become part of the placenta? a. amnion b. yolk sac c. chorion d. allantois e. none of these
Which plant has seeds that are the richest in protein?
A) wheat B) rice C) barley D) soybean