The hadal zone is that part of the benthic environment deeper than 6000 m
____________________ Indicate whether the statement is true or false.
T
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Endonucleases and exonucleases are enzymes that can remove nucleotides from a polynucleotide chain. An endonuclease removes nucleotides _______ while an exonuclease removes nucleotides _____________.
A. from the 5' end of the chain; from the 3' end of the chain B. from the 3' end of the chain; from the 5' end of the chain C. internally; from the ends of the chain D. from the ends of the chain; internally
Microparasites are usually transmitted directly from one host to another
Indicate whether the statement is true or false
Transgenic crops are planted in _____ countries, with the amount of land dedicated to such crops _____ every year
a. more than 50; remaining the same
b. more than 25; decreasing c. less than10; increasing d. more than 25; increasing e. just under 25; increasing
The primary but not only process responsible for the modifications that occur in organisms over geological time is:
a. genetic mutation. b. natural selection. c. morphological (phenotypic) modification. d. increase in fitness.