(Q).
Answer the following question given this paragraph: Lignin is a tough carbohydrate molecule that is hydrophobic ("water fearing"). It adds support to vascular tissues in stems. It also waterproofs the tissues so they don't leak, which makes them more efficient at transporting fluids. Because most other organisms cannot break down lignin, it helps protect plants from herbivores and parasites. Q: Things that are hydrophobic repel or otherwise don't really mix with what? Choices: - air - magnets - heat - water A:
(A).
water

(Q).
Answer the following question given this paragraph: Another important aspect of a species' niche is its habitat. Habitat is the physical environment in which a species lives and to which it has adapted. Features of a habitat depend mainly on abiotic factors, such as temperature and rainfall. These factors influence the traits of the organisms that live there. Q: What is the physical environment in which a species lives and to which it has adapted? Choices: - ecosystem - land mass - farmland - habitat A:
(A).
habitat

(Q).
Answer the following question given this paragraph: This chart shows the genetic code used by all organisms. For example, an RNA codon reading GUU would encode for a valine (Val) according to this chart. Start at the center for the first base of the three base codon, and work your way out. Notice that more than one codon may encode for a single amino acid. For example, glycine (Gly) is encoded by a GGG, GGA, GGC, and GGU. Notice there are 64 codons. Of the 64 codons, three are stop codons. Q: An rna codon reading guu encodes for what? Choices: - glycine - carbon - arginine - valine A:
(A).
valine