You would find primary succession at(on)
A. rock exposed by glaciers.
B. a prairie destroyed by fire.
C. an abandoned agricultural field.
D. a clear-cut forest.
A. rock exposed by glaciers.
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According to the evidence collected so far, the animal kingdom is _____
A) monophyletic B) paraphyletic C) polyphyletic D) euphyletic E) multiphyletic
Mutagenesis ____
a. is an example of spontaneous mutation b. acts directly on proteins by causing them to unfold c. occurs due to a single mRNA being translated by too many ribosomes simultaneously d. is the production of mutations in a laboratory by exposure of a living organism to a mutagen e. occurs when errors made by DNA polymerase are not repaired
What conclusion is consistent with these results?
A researcher is studying coat color in mice. Wild-type fur in mice is brown. Three pure-breeding strains of mice with white fur have been isolated. The strains are called milky, blanc, and weiss. White fur is a recessive trait in each strain. These mice are crossed to each other in pairs and the progeny phenotypes are recorded. milky × blanc = all white progeny milky × weiss = all brown progeny blanc × weiss = all brown progeny A) All three strains have mutations in the same gene. B) All three strains have mutations in different genes. C) The milky and blanc strains have mutations in the same gene; weiss has a mutation in a different gene. D) The milky and weiss strains have mutations in the same gene; blanc has a mutation in a different gene. E) The weiss and blanc strains have mutations in the same gene; milky has a mutation in a different gene.
Answer the following questions true (T) or false (F)
1. The chitin that makes up the exoskeleton of insects is a polymer of amino acids. 2. Glycogen is the carbohydrate found in plant cell walls. 3. Cholesterol is used to make other steroids in the body.