To establish that evolution by natural selection is operating in a population, one must demonstrate variability for a trait, heritability, and which of the following?
A. progress
B. differential reproductive success
C. increased complexity of an organism
D. continuous change in the environment
Answer: B. differential reproductive success
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The hormonal methods of birth control that are long-acting and not user-dependent include:
(Check all that are true) [A] Vaginal Ring [B] Progestogen-only pills [C] The "patch" [D] Birth control implants [E] Birth control injections [F] Combined oral contraceptives [G] Copper intrauterine devices
In radishes, two incompletely dominant genes control color and shape. Red and white radishes are
homozygous, whereas the hybrid is purple. Long and round are homozygous and, if crossed, will produce an oval hybrid. Give the F2 genotypic and phenotypic ratio produced by crossing pure-breed red long radishes with white round varieties. What will be an ideal response?
A(n) alternate leaf arrangement is one in which there is one leaf per node. Indicate whether the statement is true or false
Systematics reassigns phylogenetic placement based on
A) seed formation. B) reproduction. C) physical features. D) behaviors. E) new information about genetic relationships.