Breeding a yellow dog with a brown dog produced puppies with both yellow and brown hairs intermixed. This is an
example of:
a. variegation.
b. codominance.
c. incomplete dominance.
d. epistasis.
e. a polygenic trait.
b
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During the M checkpoint, the cell ____
a. proceeds to interphase and completes DNA replication b. proceeds to G2 phase and the cell prepares to divide c. proceeds to S phase or enters inactive G0 state d. monitors attachment of spindle fibers to chromosomes e. monitors completion of DNA synthesis and DNA damage
Which reaction is endergonic?
a. protein synthesis b. digestion c. fire d. respiration e. movement
As compared to the circulatory system of most fishes, the circulatory system of adult amphibians has the advantage of
A. a four-chambered heart. B. complete separation between oxygenated and deoxygenated blood. C. partially-separate circuits for gas exchange and systemic delivery of blood. D. a pocket of the gut that serves as an air bladder. E. a single circuit.
Enzyme specificity refers to the
a. specific name of each kind of enzyme. b. fact that enzymes catalyze one particular substrate or a small number of structurally similar substrates. c. effect of temperature on enzyme activity. d. effect of pH on enzyme activity.