Problem: OPTIONS:
- pound
- foot
- gallon
- liter
Q: Q: Bromine is much less abundant than fluorine or chlorine, but it is easily recovered from seawater, which contains about 65 mg of br− per what?   A:
Answer: liter
Problem:OPTIONS:
- molecule double helix
- mulecular triplex
- dna triple helix
- dna double helix

Q: Which structure includes sugar-phosphate "backbones", composed of alternating phosphate groups and deoxyribose sugars, and nitrogenous bases?   A:
****
A: dna double helix
Q: Evolving from a single common ancestor, what group of organisms was perhaps the dominant life form on earth 250 million years ago?   A:
OPTIONS:
- acids
- atoms
- proteins
- fungi
fungi
Q: What process that begins in utero during fetal development and continues on into adolescence involves closing of the skull?   A:
OPTIONS:
- incubation
- elongation
- calcification
- ossification

Answer: ossification
Question: Q: What do you call the regular changes in biology or behavior that occur in a 24-hour cycle?   A:
OPTIONS:
- cognitive rhythms
- variable rhythms
- sleep rhythms
- circadian rhythms
Answer: circadian rhythms
input: OPTIONS:
- lamarckian system
- linchpin system
- crocodilian system
- linnaean system Now, answer this question: Q: What do we call the system of classification consisting of a hierarchy of groupings called taxa?   A:
A:
output:
linnaean system