The most primitive mammals, the ________, are oviparous like their reptilian ancestors.

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


monotremes

The most primitive mammals, the monotremes, are oviparous like their reptilian ancestors.

Biology & Microbiology

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During activation of a T cell, the cytokine it produces to stimulate its own proliferation is ________.

A. interleukin 1 B. interleukin 2 C. tumor necrosis factor D. interferon gamma

Biology & Microbiology

All of the following pathogens cause respiratory infections EXCEPT

A) Mycobacterium tuberculosis B) Chicken Pox virus C) Bordetella pertussis D) Papilloma virus E) Measles virus

Biology & Microbiology

Most new alleles probably arise from ____

a. crossing over between homologous chromosomes b. independent assortment of nonhomologous chromosomes c. rearrangement of existing alleles into new combinations d. small-scale mutations in DNA e. large-scale changes in chromosome structure

Biology & Microbiology

The most important chemical group that determines how tightly histones bind DNA is

A) acetyl. B) methyl. C) ethyl. D) phosphate.

Biology & Microbiology