Which sex chromosomes are present in only one sex?

A) X and Z
B) X and W
C) Y and Z
D) Y and W
E) X and Y


D) Y and W

Biology & Microbiology

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Identical twins have identical ____, but they do not always have identical ____

a. mitochondrial DNA; genotypes b. genotypes; mitochondrial DNA c. genotypes; phenotypes d. phenotypes; genotypes e. phenotypes; mitochondrial DNA

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Campylobacter jejuniĀ is the cause of ________.

A. wilt disease in plants B. abortion in sheep and enteritis diarrhea in humans C. meningitis D. fowl cholera

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Identify the levels of organization for protein molecules, and list the type(s) of bond(s) involved in

establishing each structural level.What will be an ideal response?

Biology & Microbiology

The typical waking and sleeping cycles of most people can be described as:

a. crepuscular. b. nocturnal. c. diurnal. d. lunar. e. annual.

Biology & Microbiology