Imagine a hypothetical population of elephants and rabbits in which both species remain at carrying capacity over many generations. Who would have more offspring that survive to be adults and reproduce during their lifetime, a mating pair of elephants or a mating pair of rabbits? Explain your answer.
What will be an ideal response?
The elephants and the rabbits will have the same number of offspring that survive to adulthood and reproduce. If the population is stable, then birth rate would equal death rate and the growth rates of the two populations would be identical. While the rabbits would have a higher birth rate, they would also have a higher death rate to maintain their constant population size at carrying capacity.
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The DNA sequence of two alleles of the same gene can differ by
A) approximately 100 continuous base pairs. B) approximately 100 base pairs scattered throughout the gene. C) three base pairs (one coding triplet). D) one base pair. E) no base pairs; allele sequences can be identical.
Contraction of the diaphragm causes
A. a person to exhale. B. the size of the chest cavity to increase. C. air to flow from the lungs to the outside. D. compression of the lungs.
For a given area and time period, the amount of solar energy converted to chemical energy in organic compounds is called
A) primary succession. B) secondary succession. C) primary production. D) secondary production.
In 1964, Nirenberg and Leder used the triplet binding assay to determine specific codon assignments. A complex of which of the following components was trapped in the nitrocellulose filter?
A) sense and antisense strands of DNA B) charged tRNA, RNA triplet, and ribosome C) ribosomes and DNA D) uncharged tRNAs and ribosomes E) free tRNAs