Approximately 10—15% of insect species harbor bacteria that make needed nutrients available to the insects. How might you classify these bacteria?
A) phytoplankton
B) extremophiles
C) exotoxins
D) endosymbionts
D
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Which of the following would NOT be an example of negative feedback control in homeostasis?
A. Blood volume and pressure drop due to bleeding. This decreased pressure causes the kidneys to increase water reabsorption to increase blood volume and pressure. B. Exposure to cold water causes body temperature to drop. Decreased stimulation of heat receptors causes constriction of blood vessels near the skin and better retention of heat. C. Glucose levels rise following consumption of a big dessert, triggering release of insulin which causes glucose levels to fall. D. During the birth process, stretch receptors in the uterus stimulate the release of oxytocin from the pituitary gland. This hormone stimulates uterine muscle contraction that increases stimulation of the stretch receptors. E. Blood levels of glucose fall during sustained exercise, causing the release of glucagon which stimulates the release of glucose into the blood.
If you placed the molecule in a vertical orientation, then from top to bottom, the two parallel strands of DNA are both oriented in the same, 5? to 3?, direction
Indicate whether this statement is true or false.
The most abundant class of antibodies in serum is ________.
A. IgG B. IgE C. IgD D. IgA E. IgM
More than 90% of the ethyl alcohol that enters the body is completely oxidized to ___ ___.
Fill in the blank(s) with the appropriate word(s).