Amino acids in proteins are linked to one another by peptide bonds between the
A. methyl group of one amino acid and a side group of another amino acid.
B. carbon atoms of two adjacent amino acids.
C. carboxyl group of one amino acid and the amino group of another.
D. nitrogen atom and carboxyl ion.
C
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Which backyard would you predict to have the greatest diversity of birds?
A) one with newly planted seedlings B) one with 5- to 10-year-old trees C) one with 25- to 50-year-old trees D) one with 60- to 100-year-old trees
An ancient group of linked brain structures form the ______ system, which is involved in making some activities, like eating or sex, seem pleasurable, while others, like pain or hate, seem stressful.
Fill in the blank(s) with the appropriate word(s)
Ecosystem diversity
A. is primarily associated with aquatic habitats. B. is the diversity of animal species within a defined geographical area. C. includes only species-rich ecosystems. D. refers to the structure and function within an ecosystem.
Reptiles, birds, and some mammals share which of the following characteristics?
A) produce amniotic eggs B) are predators C) are warm-blooded D) exhibit live birth E) have light, hollow bones