______________ twins result from a single fertilization event. Fill in the blank(s) with the appropriate word(s). Fill in the blank(s) with the appropriate word(s)


ANS: Monozygotic

Biology & Microbiology

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Edouard van Beneden proposed that an egg and a sperm, each containing half the complement of chromosomes found in somatic cells, fuse to produce a single cell called a(n) ______. 

A. zygote B. karyotype C. embryo D. oocyte

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The most abundant protein on Earth is:

A. chlorophyll. B. cellulose. C. rubisco. D. water. E. keratin.

Biology & Microbiology

Which of the following is not a type of natural selection?

A. disruptive selection B. directional selection C. artificial selection D. All of the answer choices are correct. E. stabilizing selection

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During conscious, quiet rest, the brain is emitting:a

alpha rhythm patterns. b. beta rhythm patterns. c. delta waves. d. gamma waves. e. theta waves.

Biology & Microbiology