Research indicates that ________ respond(s) to ________ signals that inform a cell about its position relative to other cells in the embryo
A) nervous tissue; hormonal
B) master control genes; chemical
C) organs; electrical
D) organelles; chemical
Answer: B
Biology & Microbiology
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Enzymes act as
A. substrates. B. catalysts. C. products. D. catabolites.
Biology & Microbiology
What percent of a person’s 3 billion
nucleotides is unique to that person?
a. 1 b. 5 c. 10 d. 25 e. 50
Biology & Microbiology
The first step in wound healing is ____
a. formation of an embolus b. platelet aggregation c. vessel spasm d. fibrinogen formation e. formation of a blood clot
Biology & Microbiology
This basic food group provides minerals, water, vitamins, carbohydrates, and protein for your diet. About 75% of all the calcium in the United States food supply comes from this group.
A. meat and beans B. dairy products C. vegetables D. fruits
Biology & Microbiology