The small intestine is longer than the large intestine.
Answer the following statement true (T) or false (F)
True
The small intestine is about 18 feet in length, while the large intestine is only about 4.5 feet in length.
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In humans, male-pattern baldness may be assumed to be controlled by an autosomal gene that occurs in two allelic forms. Allele B determines nonbaldness, and allele b determines pattern baldness. In males, because of the presence of testosterone, allele b
is dominant over B. If a man and woman both with genotype Bb have a son, what is the chance that he will eventually be bald? A) 0% B) 25% C) 33% D) 50% E) 75%
All populations of different species living and interacting within an ecosystem are referred to collectively as a(n) ________
Fill in the blank(s) with correct word
The heritability of a trait is the ____
a. sum of all phenotypic variation in a population b. average amount of genetic variation in each individual c. proportion of phenotypic variation that is caused by different genotypes d. absolute measurement of genotypic variation in a population e. proportion of phenotypic variation that is caused by the environment
Why are males usually the sex with exaggerated traits used in courtship?
A. In most species, males protect their larger investment in offspring by being choosy about their mates. B. In most species, males compete for the opportunity to mate with females. C. In most species, females protect their larger investment in offspring by being choosy about their mates. D. In most species, females can afford to be choosy about their mates because of females' smaller investment in offspring.