A small founder population of turtles has established a population on an island with a varied and good habitat that contains ample food. There is very little competition between members
What effect would this low level of competition have on evolution? A) The population will remain very stable in size, and it won't evolve much.
B) The population will grow in size but won't change much.
C) The population will grow in size, and many variants will coexist.
D) Genetic drift will eliminate most of the population.
C
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The B-I mutation in anthocyanin (red pigments) produces pigmented corn plants, whereas the B? mutation in the same gene usually produces nearly unpigmented corn plants when homozygous (B ´/B ´). When homozygous B-I and B? plants are intercrossed
, the F1 plants are essentially unpigmented, like the B? homozygotes. If this outcome were due simply to the dominance of B? to B-I, then a self-cross of the F1 plants (B ´/B-I) should generate B-Iâ€"colored homozygotes as approximately 1/4 (B-I/B-I) of the F2 progeny. Instead, no F2 are pigmented. Intercrosses of the F2 and of further generations do not restore the pigmented phenotype. What is the term for this type of inheritance? A) Mendelian inheritance B) organelle genome inheritance C) allelic inheritance D) epigenetic inheritance
________ were the first vertebrates to live on land and they evolved from ________.
A. Mammals; reptiles B. Reptiles; amphibians C. Amphibians; fish D. Amphibians; lancelets
The dietary carcinogen aflatoxin can be found in
A) fresh fruits. B) red meats. C) salt. D) alcohol. E) raw peanut butter.
What type of cells respond to a particular hormone?
A) glandular B) target C) receptive D) endocrine