If a sperm cell containing a defective copy of the gene on the Y chromosome that encodes testosterone fertilizes an egg, what effect will this have on the developing embryo?
a. There will be no effect so long as the X chromosome is intact.
b. The cells of the embryo will undergo apoptosis early in development.
c. The embryo will develop female sexual tissues and characteristics.
d. Increased hair growth will begin in utero and continue until adolescence.
c. The embryo will develop female sexual tissues and characteristics.
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A relationship which benefits flow both ways
between the interacting species is
a. a neutral relationship. b. commensalism. c. competition. d. mutualism. e. parasitism
Which of the following will pass through a cell membrane most easily?
small polar molecules small nonpolar molecules large polar molecules large nonpolar molecules large neutral molecules
Which of the following is the energy carrier compound for living organisms?
What will be an ideal response?
Which of the following is NOT characteristic of Actinomyces israelii?
A. Important for compost production B. Found in soll C. Rads with colonies displaying hyphael growth D. Strict aerobe E. Non-endospore farmer