Which of the following statements is true?
A. Many variable traits in a population result from the combined effect of several genes.
B. Only one allele for a particular trait is considered for inclusion into the gene pool.
C. Environmentally induced traits are passed on to offspring.
D. Environmental influences have nothing to do with variation in phenotype within a population.
A. Many variable traits in a population result from the combined effect of several genes.
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People at greatest risk for pneumococcal infections include all the following except
A. those with underlying lung disease and viral infections. B. adolescents and young adults. C. patients without a spleen. D. young infants. E. the elderly.
As the lungs expand, intra-alveolar pressure ________ and air moves ________ the lungs.
A) decreases : out of B) decreases : into C) increases : out of D) increases : into E) does not change : neither into nor out of
With __________, offspring inherit the same number and kinds of genes from one parent.
Fill in the blank(s) with the appropriate word(s).
The release of acetylcholine into the neuromuscular junction is shortly followed by the release of ________ ions from the sarcoplasmic reticulum
Fill in the blank(s) with correct word