The glandular secretions involved in digestion that would most likely be released as inactive precursors are
A. protein-digesting enzymes
B. fat-solubilizing bile salts
C. acid-neutralizing bicarbonate
D. carbohydrate-digesting enzymes
A. protein-digesting enzymes
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Which examples would be considered different species under the biological species concept? Check all that apply.
_____ Two bear species are able to breed in zoos, but have separate ranges in nature. _____ Two skunk species look morphologically similar, but are unable to interbreed. _____ Two snake species look different, but often form fertile hybrids. _____ Two plant species with no gene flow between them. _____ Two tree species have different leaf shapes, but form hybrids in their overlapping ranges. 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 the biological species concept? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
The "natural" use of restriction enzymes by bacteria is to
a. integrate viral DNA. b. cut apart short sequences of bases in DNA. c. repair "sticky ends." d. copy the bacterial genes. e. clone DNA.
In eukaryotes, photosynthesis takes place inside the ________.
A. cytoplasm B. chloroplasts C. mitochondria D. Golgi apparatus
What three plant tissue systems are contained in the stem?
A. root hairs, meristem, and vascular B. dermal, vascular, and ground tissue C. dermal, meristem, and vascular D. dermal, ground tissue, and meristem