Why is the COI gene sequence unsuitable as a DNA barcode for plants?
a. The gene has a much faster evolution rate in plants.
b. The gene has a much slower evolution rate in plants.
c. There are too many plant species.
d. There are not enough plant species.
e. It is too difficult to extract plant DNA.
ANSWER: b
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Which algebraic expression would be used to denote a trisomic organism?
A. 3n B. 2n - 1 C. 2n + 1 D. 2n + 2
Organisms that live in and around hydrothermal vents at the bottom of the ocean are:
A) acidophilic, psychrophilic, and halophilic. B) halophilic, alkaliphilic, and psychrophilic. C) halophilic, psychrophilic, and barophilic. D) halophilic, thermophilic, and barophilic.
Why is it unlikely that DNA was NOT the first
self-replicating molecule of life?
a. nitrogen is essential for constructing DNA and there was no nitrogen on early Earth b. DNA is hyper-sensitive to oxygen and would have disassembled quickly in its presence c. DNA requires proteins like DNA polymerase for assembly so it doesn’t truly “self-replicate” d. it must have RNA to self-replicate and RNA evolved much later in life’s history e. more than one of these is correct
There are a number of sites around the world that have been made uninhabitable because of chemical pollution in the soil. Which group of organisms might have useful biological tools for breaking down these toxic compounds?
A) animals B) fungi C) protists D) plants