Which of the followings substance is NOT
secreted by an exocrine gland?
a. mucus
b. hormones
c. tears
d. earwax
e. digestive enzymes
B
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In general, swimming is performed with flagella, whereas gliding uses other cellular components such as pili
Indicate whether the statement is true or false.
Sex chromosomes are
a. completely different between the two sexes. b. partially homologous but also have unique regions. c. found only in males. d. unable to line up properly at the metaphase plate. e. completely homologous but always have different alleles.
You are studying the development of a poorly-understood species at the 8-cell stage. You use a laser to zap away a certain one of the eight cells, and discover that part of the gut is missing once the embryos finish development. Your colleague, who is working on a different species, uses the laser to blast away one of the cells in her embryos, zapping each of the possible cells in a set of eight experiments. However, when the embryos finish development, every one is perfectly normal! What can you conclude about the two species?
A. The first species has regulative development, the second has non-regulative development. B. The first species has non-regulative development, the second has regulative development. C. Both species have regulative development. D. Both species have non-regulative development. 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 cleavage and developmental pathways? 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?
If chromosomal DNA from a host is the only type of DNA carried by a transducing particle, what can be concluded regarding transduction in this case?
A. Transduction in this case is neither generalized nor specialized. B. Transduction in this case could be generalized or specialized depending on the phage involved. C. Transduction in this case is generalized rather than specialized. D. Transduction in this case is specialized rather than generalized.