The health risk of a pathogen is determined by its transmissibility and its virulence.
a. true
b. false
Answer: a. true
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Which one of the following is the portion of the forebrain that regulates the endocrine system and body temperature?
A. cerebrum B. thalamus C. limbic system D. hypothalamus
Reproductive isolating mechanisms are
a. specific behaviors that allow males to compete against other males for females. b. the processes by which sexual selection evolves within a population. c. the ways that gene flow is blocked between populations. d. the ways in which individuals within a species are unable to produce fertile offspring. e. the various geographic barriers to immigration and emigration of individuals between populations.
__________ is the transition zone where two ecosystems meet and intergrade
a. The intertidal zone b. An ecotone c. A range d. A biome e. A thermocline
In metaphase I of meiosis
A) chromosomes condenses B) chromosomes are arranged at the equator C) chromosomes move towards opposite poles D) chromosomes undergo cytokinesis