When both dominant and recessive alleles are present within a single nucleus, the organism is for the trait
a. diploid
b. haploid
c. homozygous
d. heterozygous
a
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Which of the following best defines “evolution” as it is used in the theory of evolution?
a. The change in genetic composition of a population over generations b. Genetic changes brought about by a higher being in the spiritual world c. The change in genetic composition of an individual during a lifetime d. Changes programmed by a set of genes acquired at birth
Luria and Delbruck grew many liquid cultures of bacteria then spread a small sample of each culture on nutrient agar infused with bacteriophage in separate petri plates. They assayed the number of bacterial colonies that formed on each plate. What did the appearance of a bacterial colony on a petri plate indicate?
A) The bacterial colony was derived from one initial cell that was resistant to infection by the bacteriophage. B) The bacterial colony was made up of many cells that became resistant to bacteriophage infection independently. C) A colony formed when a bacterial cell was not resistant to bacteriophage infection. D) The bacterial cells that made up a colony were resistant to antibiotic.
The predictable change in morphological and physiological features as a function of body size is referred to as ________
Fill in the blank(s) with correct word
An increase in sympathetic nervous activity to arterioles will have little effect on vasoconstriction of the
A) brain and heart. B) heart and kidneys. C) kidneys. D) skeletal muscles. E) gastrointestinal tract