Barophiles ____.
a. cannot cause disease in humans
b. live at a normal barometric pressure
c. die if put under high pressure
d. thrive in warm air
Ans: a. cannot cause disease in humans
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Smallpox
A. has been eliminated as a naturally occurring infection in human beings. B. still occasionally occurs in third world countries. C. probably only had a human reservoir. D. was dealt with by vaccination. E. has been eliminated as a naturally occurring infection in human beings, AND was dealt with by vaccination.
The per capita growth rate of a population is best defined as
A. the change in population size per unit time. B. having a constant value for a particular species. C. per capita birth rate minus per capita death rate. D. growth rate when a population is at equilibrium. E. logistic growth.
Crossing-over during meiosis ____
a. holds homologous pairs of chromosomes together b. produces chromosomes consisting of two identical sister chromatids c. produces daughter nuclei with too much or too little genetic material d. creates chromosomes containing both paternal and maternal genes e. ensures that the developing zygote receives cytoplasm from one of the parents
The study of how gene expression is altered by factors in the cell's environment rather than the DNA sequence of the gene itself is called ________
Fill in the blank(s) with correct word