In the process of spermiogenesis, ______ become _______.
Fill in the blank(s) with the appropriate word(s).
spermatids; spermatozoa
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What is the difference between a linkage map and a physical map?
A) Markers are spaced by recombination frequency on a linkage map and by number of base pairs on a physical map. B) The ATCG order and sequence must be determined for a linkage map but not for a physical map. C) A linkage map shows how each gene is linked to every other gene, but a physical map does not. D) Distances must be calculable in units such as nanometers on a physical map but not on a linkage map. E) There is no difference between the two except in the type of pictorial representation.
Most microorganisms assimilate nitrogen as ________.
A. nitrite B. nitrate C. N2 D. hydrazine
Which of the following is not a general requirement for complex multicellular life?
A. Cells must retain a full range of functions, including reproduction. B. Cells must stick together. C. Cells must communicate with one another. D. Cells must participate in a network of genetic interactions that regulate cell division. E. All of these options are requirements for complex, multicellular life.
Which of the following glands secrete sebum, an oily like substance?
A) merocrine glands B) apocrine glands C) sebaceous glands D) eccrine.