What is true of the fossil record of mammalian origins?
A) It shows that mammals and birds evolved from the same kind of dinosaur.
B) It includes transitional forms with progressively specialized teeth.
C) It indicates that mammals and dinosaurs did not overlap in geologic time.
D) It includes a series that shows the gradual change of scales into fur.
B
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When reproductive interests between males and females of the same species differ, as in the case of fruit flies, sexual selection may actually favor adaptations arising in one sex but that are detrimental in the other sex
This, in turn, leads to subsequent "counter-measure" adaptations in the sex that are subject to harm or detriment. This kind of antagonistic sexual adaptation has been termed ________ sexual selection. Fill in the blank(s) with correct word
Which of the following statements is not true about natural selection?
a. Offspring of individuals that are better adapted will make up a larger proportion of the next generation. b. Natural selection directs evolution by preserving traits acquired during an individual's lifetime. c. Natural selection depends on the genetic variability in a population, which arises through mutations. d. Natural selection acts to preserve favorable traits and eliminate unfavorable traits. e. Natural selection leads to adaptive evolutionary change.
A ________ is any disease-producing microorganism.
Fill in the blank(s) with the appropriate word(s).
Consider a cross to investigate the pea pod texture trait, involving constricted or inflated pods. Mendel found that the traits behave according to a dominant/recessive pattern in which inflated pods were dominant. If you performed this cross and obtained 650 inflated-pod plants in the F2 generation, approximately how many constricted-pod plants would you expect to have?
A. 600 B. 165 C. 217 D. 468