Which of the following statements about retinoblastoma offers support for the idea that multiple

mutations are needed in cancer?
A. Noninherited cases involve both eyes and occur later in life.
B. Noninherited cases involve both eyes and occur early in life.
C. Inherited cases involve one eye and occur early in life.
D. Inherited cases involve one eye and occur late in life.
E. Noninherited cases involve one eye and occur later in life.


E

Biology & Microbiology

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Sleeping sickness is transmitted by:

A. mosquitoes B. tsetse flies C. sand fleas D. ticks E. drinking contaminated water

Biology & Microbiology

An enucleated egg cell ________

A) contains an extra copy of a gene B) has two nuclei C) lacks a nucleus D) cannot be used for cloning E) is a type of stem cell

Biology & Microbiology

Describe the positive control exerted by the catabolite activating protein (CAP). Include a description of catabolite repression

What will be an ideal response?

Biology & Microbiology

Choose the letter of the best match from the following:A. cognitionB. waggle danceC. navigationD. filial imprintingE. fixed action patternA form of communication in honeybees.

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

Biology & Microbiology