In the process of spermiogenesis, ______ become _______.

Fill in the blank(s) with the appropriate word(s).


spermatids; spermatozoa

Biology & Microbiology

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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.

Biology & Microbiology

Most microorganisms assimilate nitrogen as ________.

A. nitrite B. nitrate C. N2 D. hydrazine

Biology & Microbiology

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.

Biology & Microbiology

Which of the following glands secrete sebum, an oily like substance?

A) merocrine glands B) apocrine glands C) sebaceous glands D) eccrine.

Biology & Microbiology