Which antioxidant is naturally found in cocoa?
A) vitamin A
B) beta-carotene
C) flavonol
D) vitamin C
C
Biology & Microbiology
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During gastrulation, _____
A) the neural tube forms B) the blastula forms C) somites form D) three germ layers form
Biology & Microbiology
Which molecule provides the energy for the assembly of new nucleotides into a DNA strand during DNA replication?
a. ATP b. the nucleotide itself c. NADH d. primers e. DNA ligase
Biology & Microbiology
Which type of molecule reinforces the shells of forams?
a. calcium carbonate b. hydrogen sulfide c. copper sulfate d. silica
Biology & Microbiology
Life probably would never have emerged on Earth if the ancient atmosphere had been the same as the present one in regard to the content of ____.
A. carbon dioxide B. hydrogen C. oxygen D. nitrogen E. carbon monoxide
Biology & Microbiology