Write an equation that describes a situation in which a population remains stable
What will be an ideal response?
Birth + immigration = death + emigration, or r = (birth rate + immigration rate) - (death rate + emigration rate ) = 0.
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The primers in PCR are
a. fragments of mRNA. b. designed to base pair with mRNA. c. free nucleotides. d. radioactive. e. none of these
The main role of the liver is to ________
A) absorb nutrients B) absorb water C) produce bile, which helps the process of digestion D) break large food into smaller food bits
A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy-Weinberg equation, 2pq represents the
A) proportion of homozygous dominant individuals. B) decrease in heterozygous individuals. C) proportion of homozygous recessive individuals. D) increase in homozygous individuals. E) proportion of heterozygous individuals.
The stomata open depending on the following conditions, except ____.
A. when the guard cells are swollen with water B. decreased turgor in guard cells C. low carbon dioxide level in the leaf D. voltage change in guard cell membranes stimulated by sunlight E. hot, dry environment