Alleles are identical by descent if:
a. two individuals have the same parents.
b. one allele mutates to second allele.
c. selfing occurs.
d. a recent common ancestor gave rise to two or more individuals with identical alleles.
e. balancing selection maintains two or more alleles.
D
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While establishing a symbiotic relationship, plant hosts communicate with bacteria via secretion of flavonoids and bacteria release Nod factors to communicate with the plant.
Answer the following statement true (T) or false (F)
Bacteroids are ____
a. specialized nitrifying bacteria b. small buds from ammonifying bacteria c. specialized bacteria that help some plant roots absorb phosphorus d. enlarged and immobilized nitrogen-fixing bacteria e. interactions between plant root hairs and bacteria
Allosteric inhibition is generally a result of:
a. excess substrates b. binding regulatory molecules at a site other than the active site c. a change in the temperature of the system d. binding of the regulatory molecule at the active site e. pH inhibition
What technique detects brain voltage (electrical activity) fluctuations?
a. molecular biology techniques using brain tissue b. x-rays c. positron emission tomography (PET) d. electroencephalograph (EEG) e. functional magnetic resonance imaging (fMRI)