Which is NOT a mechanism of horizontal gene transfer (HGT)?
a. transduction
b. transposition
c. transformation
d. Neither transduction nor transposition are HGT.
Answer: B
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Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?
A. oxygen B. hydrogen C. carbon D. nitrogen E. sulfur
Glucose and fructose
a. form rings with the same number of carbon atoms. b. both have an oxygen atom as part of their ring structure. c. are alike in that both have identical functional groups. d. contain the same number of hydrogen atoms and hydroxyl groups. e. are disaccharides.
Plants growing in shade have a higher rate of leaf respiration than plants growing in sunlight
Indicate whether the statement is true or false
The naturally occurring helium atom is chemically inert because:
A) its outermost shell is filled with electrons. B) it has all of the shared electrons it could ever have. C) it has the most protons that it could ever carry. D) its nucleus is filled with two neutrons.