Which of the following statements is true of restriction enzymes?
(a)they are not naturally...
Biology, 26.07.2019 05:30 xxmattieboo7xx
Which of the following statements is true of restriction enzymes?
(a)they are not naturally produced by bacteria, but are bioengineered by humans.
(b)they cleave dna only at sites of adjacent thymine bases.
(c)there are less than 10 restriction enzymes known.
(d)they cut at random sites within a genome. they protect bacterial cells from invasion by foreign dna.
Answers: 3
Biology, 22.06.2019 01:20
Which of the following is not considered an appendage of the skin? nails glands follicles none of the above
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Biology, 22.06.2019 06:00
Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?
Answers: 1
Biology, 22.06.2019 12:40
Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.
Answers: 1
Biology, 22.06.2019 16:30
The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?
Answers: 3
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