Which of the following statements is not true?
a. Archaea and bacteria have different membrane lipids.
b. Both archaea and bacteria generally lack membraneenclosed organelles.
c. The cell walls of archaea lack peptidoglycan.
d. Only bacteria have histones associated with DNA.
e. Only some archaea use CO2 to oxidize H2 releasing methane
Answer: d. Only bacteria have histones associated with DNA.
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DNA methylation is the only known natural modification of DNA. It affects
A. adenine bases. B. guanine bases. C. cytosine bases. D. thymine bases.
In transduction, bacteria acquire new genetic information in the form of:
A) bacterial genes. B) naked DNA. C) R-factors. D) viral genes.
If the sunflowers represent 2400 calories, how many calories would be available at the level
of the possums that eat spiders?
a. 10 b. 2.4 c. 24 d. 1000
Nonvascular plants
A. lack roots, stems, and leaves. B. are tall plants. C. produce pollen. D. None of the above is correct.