Adaptive traits are
A. favored by natural selection.
B. caused by mutation.
C. not selected from one generation to the next.
D. selected against.
E. usually recessive alleles.
Question 2
This chapter describes the case of giraffes' long necks to illustrate how natural selection works on variety within a population. This explanation contrasts with the incorrect alternative of the inheritance of acquired characteristics, which suggests that
A. in each generation, individual giraffes strain their necks to reach food just a bit higher, and that this straining somehow modifies their genetic material.
B. in each generation, individual giraffes mate with giraffes having longer necks because they are better at getting food, and their offspring's neck size results in an average of the parents' neck sizes.
C. a need for a longer neck activates the long-neck gene throughout development.
D. natural selection works on the genotype, not the phenotype.
E. the presence of variety among a population works against the advantages of natural selection.
The Grants and natural selection of beak size among the medium ground finch.
Traits and trees
The two skills of the element Selection of Alternatives
A wrinkled and round garden pea, the phenotypic traits in one of Mendel’s monohybrid crosses
Chart showing average yearly dose of radiation from natural and human-made sources
Persistent Juvenile Traits in Salamanders