Tall (D) is dominant to dwarf (d). If a true-breeding tall plant is crossed with a true-breeding dwarf plant, the F2 generation will have a tall:dwarf phenotypic ratio of __________.
Fill in the blank(s) with the appropriate word(s).
3:1
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As prey species evolve more effective means to avoid being caught, predators evolve more effective means to capture them
Indicate whether the statement is true or false
The three basic variables that make up the life history of an organism are
A) life expectancy, birth rate, and death rate. B) number of reproductive females in the population, age structure of the population, and life expectancy. C) age when reproduction begins, how often reproduction occurs, and how many offspring are produced per reproductive episode. D) how often reproduction occurs, life expectancy of females in the population, and number of offspring per reproductive episode. E) the number of reproductive females in the population, how often reproduction occurs, and death rate.
______ is a change in the allele frequencies of a population over time.
a) Vicariance b) Microevolution c) Genetic equilibrium d) Speciation
Dependence on animal vectors for fertilization and dispersal is characteristic of many species of ____.
A. ferns B. angiosperms C. mosses D. conifer E. cycads