1. which of the following is true for all the animals in the suborder pinnipedia
a. they have external ears
b. they come out on land to rest, breed and give birth
c. they have two large air pouches on sides of their neck
d. they walk on land
2. which of the following is a characteristic that sea otters stay warm in cold pacific waters?
a. a thick layer of fur
b. wrapping themselves in kelp
c. swimming fast to generate heat
d. a thick blubber layer

When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Explain why ecosystem diversity results in species diversity in a healthy biosphere