The first air-breathing land animals were:a
snails.
b. reptiles.
c. arthropods.
d. amphibians.
e. vertebrates
c
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As a naturalist, you are responsible for training volunteers in the identification of the types of amphibians. The volunteers will use this information to correctly describe the animals to school groups that will visit your nature center. The training documentation for the volunteers lists important characteristics of the different groups of amphibian, but you notice that one of the items on the list is incorrect. Indicate which description is not correct.
A. Frogs and toads have external fertilization whereas salamanders and caecilians have internal fertilization. B. Frogs, toads, and most salamanders have four legs whereas caecilians are legless. C. Frogs and toads lay eggs whereas some caecilians lay eggs and others give birth to live young. D. Salamanders and caecilians have external tails whereas frogs and toads do not. E. Adult frogs, toads, and salamanders are predators of insects and other small animals whereas caecilians are herbivores.
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.
Which of the following is NOT a form of passive
transport? a. osmosis b. facilitated diffusion c. simple diffusion d. exocytosis e. none of these
The morels and truffles belong to which group?
A. ascomycetes B. basidiomycetes C. imperfect fungi D. zygomycetes