Drosophila melanogaster is a/an __________. This type of animal is the most abundant of all animal species, making it an appropriate choice as an experimental model
(a) insect
(b) bird
(c) amphibian
(d) mammal
(a)
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Macrocystis, kelp, and Sargassum are examples of
a. red algae. b. chlorophytes. c. brown algae. d. bryophytes. e. pterophytes.
Human growth hormone is produced by the ______________ and erythropoietin is produced by the __________________.
a) pituitary gland; red blood cells b) pituitary gland; kidneys c) kidneys; pituitary gland d) pituitary gland; osseous tissue e) white blood cells; red blood cells
What happens when hydrochloric acid (HCl) dissociates in pure water?
A) The water has a decrease of H+ ions. B) The concentration of OH- ions increases. C) The HCl molecules float on top of the water. D) The pH of the solution increases. E) The HCl molecules separate into H+ and Cl- ions.
Primary immunodeficiency diseases
A. develop later in life. B. are detectable close to birth. C. may be caused by malnutrition. D. are never associated with genetic defects. E. are sometimes caused by severe stress.