When taken by pregnant women, ________ decreases the chance of neural tube defects in infants

A) folic acid
B) vitamin C
C) vitamin K
D) calcium


Answer: A

Biology & Microbiology

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Which of the following proteins is responsible for advancing a cell through the four phases of the cell cycle?

A. caspases B. cyclins C. claudins D. endonucleases E. cofactors

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Crossing over usually occurs in which of the following stages of meiosis?

a. prophase I b. interphase c. anaphase II d. metaphase I e. telophase II

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A cherry blossom has all four sets of modified leaves (sepals, petals, stamens, and carpels), so it is called a

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

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What is the frequency of the heterozygote genotype in this population?

1.0.24 2.0.36 3.0.48 4.0.16

Biology & Microbiology