Which statement is true about the structure of DNA?
A) It is a polymer made up of a string of amino acids.
B) Each different sequence folds into a different three-dimensional shape.
C) The two strands of a DNA molecule are held together by base pairing.
D) It contains nitrogenous bases known as A, C, G, and U.
C) The two strands of a DNA molecule are held together by base pairing.
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In ferns, the ________ generation is dominant
A. haploid gametophye B. diploid gametophyte C. haploid sporophyte D. diploid sporophyte E. haploid prothalophyte
The specific chemical compound that is acted on by an enzyme is called a(n) ____________________. Fill in the blank(s) with the appropriate word(s)
Explain this statement: "There is bias in the fossil record." What will be an ideal response?
To increase the surface area of some cells, the plasma membrane possesses
A) receptors. B) flagella. C) microvilli. D) transport proteins.