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