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.


E. Adult frogs, toads, and salamanders are predators of insects and other small animals whereas caecilians are herbivores.

Biology & Microbiology

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Why do we perceive chili peppers as "hot" and peppermint as "cold"?  

 TRP channels normally act as temperature sensors in the body -- they are stimulus-gated ion channels, each specialized to open at various temperature thresholds. However, different TRP channels can also be gated by certain molecules such as capsaicin or menthol. A.  It is a cultural convention to speak of chili peppers as hot and peppermint as cold. B.  Capsaicin and menthol act as agonists of TRP channels normally activated by temperature changes. C.  We are conditioned to think so because chili-containing foods are served hot, while mint-containing foods are served cold. D.  Neurons sensitive to heat or capsaicin project to nearby regions of the brain, while neurons sensitive to cold or menthol project to other adjacent regions. E.  Capsaicin transmits infrared energy, while menthol absorbs it. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about TRP channels? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

Fats, oils, and waxes are called:

a. sugars. b. polysaccharides. c. lipids. d. proteins. e. monomers.

Biology & Microbiology

Mitochondria play an important role in cell necrosis

__________________Indicate whether the statement is true or false.

Biology & Microbiology

Once you have a DNA library, you can be confident you hace successfully cloned the gene of intrest.

a. true b. false

Biology & Microbiology