What kinds of molecules pass through a phospholipid bilayer most easily
What will be an ideal response?
Answer: Small uncharged molecules can pass through the membrane freely, water, nutrients, and waste can move through the transport proteins
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Which test provides the earliest indication of genetic problems in a fetus?
A. Amniocentesis B. Chorionic villus sampling C. Both provide reliable indications at the same stage of development
A hominid of Europe and Asia that became extinct about 35,000 years ago was:
a. a dryopith b. Australopithecus boisei c. Homo erectus d. Neanderthals e. Australopithecus robustus
How do the anterior and posterior pituitary
glands differ?
a. the anterior pituitary produces peptide hormones while the posterior pituitary produces steroid hormones b. the anterior pituitary produces its own hormones but the posterior pituitary doesn’t c. the anterior pituitary is a part of the nervous system; the posterior pituitary is a part of the endocrine system d. the anterior pituitary is controlled by the hypothalamus whereas the posterior pituitary is controlled by the adrenal cortex e. the anterior pituitary is under voluntary control; the posterior pituitary is under involuntary control
Amino acids and other organic molecules were formed in the laboratory of Miller and Urey from which of the
following? a. hydrogen, methane, water, ammonia, and electrical discharge b. heat, ultraviolet radiation, water, carbon dioxide, and amines c. heat, infrared radiation, water, carbon dioxide, and free nitrogen d. heat, electrical discharge, water, nitric oxide, and carbon dioxide e. ultraviolet radiation, electrical discharge, carbon dioxide, nitrogen, and ammonia What will be an ideal response?