Edgar, a biochemist, claims to have found a new variety of a type of small biomolecule. edgar notes that there are now 21 types of this biomolecule instead of the old known 20. the molecule can also be combined with others in its class to produce a wide variety of proteins, some liquid and others solid. what type of biomolecule did edgar find?

a.
a nucleic acid
b.
a monosaccharide
c.
an amino acid
d.
a fatty acid

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.

Pulmonary arteries carry highly oxygenated blood. true or false?

One drawback of dams is that they can flood land upstream from the dam and reduce water flow downstream from the dam. a. true b. false