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?    Choices:  - pound  - foot  - gallon  - liter  A:
liter
(Question)
Q: Which structure includes sugar-phosphate "backbones", composed of alternating phosphate groups and deoxyribose sugars, and nitrogenous bases?    Choices:  - molecule double helix  - mulecular triplex  - dna triple helix  - dna double helix  A:
(Answer)
dna double helix
Ques: Q: Evolving from a single common ancestor, what group of organisms was perhaps the dominant life form on earth 250 million years ago?    Choices:  - acids  - atoms  - proteins  - fungi  A:
Ans: fungi
(Q).
Q: What process that begins in utero during fetal development and continues on into adolescence involves closing of the skull?    Choices:  - incubation  - elongation  - calcification  - ossification  A:
(A).
ossification
Ques:Q: What do you call the regular changes in biology or behavior that occur in a 24-hour cycle?    Choices:  - cognitive rhythms  - variable rhythms  - sleep rhythms  - circadian rhythms  A:

Ans:circadian rhythms
Question: Q: What do we call the system of classification consisting of a hierarchy of groupings called taxa?    Choices:  - lamarckian system  - linchpin system  - crocodilian system  - linnaean system  A:
Answer:
linnaean system