Life history adaptations of ___________ populations are characterized by an early age of first reproduction and short maturation time and life span.
A. r-selected
B. K-selected
A. r-selected
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Pioneering species inhabiting a disturbed area alter the environment and create new habitats
a. False, the habitat cannot be changed by a living organism. b. True, organisms moving to a disturbed area use the resources and can themselves be a resource or can provide resources such as shade. c. False, pioneering species are very short-lived and so do not invest enough time to change the habitat
One of a pair of glands that produces fluid that nourishes sperm and assists movement of sperm in the female reproductive tract. _____
A) Endometrium B) Testis C) Cervix D) Uterus E) Oviduct F) Ovaries G) Vagina H) Seminal vesicle I) Penis J) Prostate gland K) Vas deferens L) Glans penis
The maximum useful magnification for a light microscope is about
a. 100X. b. 1000X. c. 10,000X. d. 100,000X.
The minimum number of microbes required for infection to proceed is termed a/an ________.
A. indigenous biota B. infectious dose C. virulence factor D. minimal dose E. endotoxin