A geologist going through a sediment core is likely to find remnants of ancient calcium carbonate containing ________ and silica containing ________
A) diatoms / cercozoans
B) cercozoans / diatoms
C) chlorarachniophytes / foraminiferans
D) foraminiferans / chlorarachniophytes
Answer: B
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Mutations that result in a single amino acid substitution in an enzyme _____
A) cannot affect the activity or properties of the enzyme B) will destroy the activity of the enzyme C) will change the substrate specificity of the enzyme D) may change the enzyme's optimal temperature or optimal pH E) may, in rare cases, cause the enzyme to run reactions in reverse
Answer the following statements true (T) or false (F)
1. In the organismic model, communities are viewed as superorganisms. 2. A forest community consists of not only the trees and shrubs, but also the animals and microorganisms. 3. The time hypothesis suggests communities diversify with age. 4. In the Shannon diversity index, communities with a very uneven distribution of individuals will tend to have a higher H.
To study the maximum amount of genome diversity in the human species, which of the following provides the most information?
A) karyotyping B) SNP variation C) DNA fingerprinting D) sequencing of one or more specific genes E) ortholog comparisons
Which of the following are rod-shaped bacteria?
a. vibrio b. bacilli c. diplococci d. spirochete e. streptococci