Each chromosome contains a constricted region called a(n) ____________________ where sister chromatids attach
Fill in the blank(s) with correct word
centromere
Biology & Microbiology
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Rotifers possess
a. cilia. b. a mouth. c. protonephridia. d. nerve cells. e. all of these.
Biology & Microbiology
Precipitation brings appreciable quantities of nutrients into ecosystems that are collectively called ________
Fill in the blank(s) with correct word
Biology & Microbiology
Which of the following adaptations is NOT associated with the ability of birds to fly?
a. high metabolic rate b. broad, keeled breast bone c. "one-way" air flow through the respiratory system d. hollow bones e. enlarged visual centers
Biology & Microbiology
What cytokine is secreted by virally infected cells to induce a virus-resistant state in nearby cells?
A) interleukin-4 B) interleukin-10 C) interleukin-5 D) interferon-alpha E) interferon-beta
Biology & Microbiology