What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?
A) ionic bond
B) covalent bond
C) hydrogen bond
B
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Examine the digestive system structures in the figure above. Bacteria that produce vitamins are found in the greatest concentration in location _____
A) 3 B) 4 C) 5 D) 7 E) 8
Which of the following is a phototroph?
A) a tree B) a mushroom C) bacteria growing on decomposing matter D) an earthworm E) a person
Which of the following is not true of a codon?
A. It consists of three nucleotides. B. It is the basic unit of the genetic code. C. It extends from one end of a tRNA molecule. D. It may code for the same amino acid as another codon. E. It never codes for more than one amino acid.
Choose the true statements about species that show convergent evolution. Check all that apply.A) They do not share a recent common ancestor.B) They must be found in the same biogeographical region.C) They are subject to similar selection pressures.D) They have similar phenotypes.
What will be an ideal response?