A muscle that decreases the angle between two bones at a joint is called a(n)____
a. flexor
b. agonist
c. depressor
d. antagonist
e. extensor
ANSWER: a
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Which of the following describe an aspect of epistasis?
_____ A situation where a single character is controlled by more than one gene. _____ A phenomenon where one gene masks the expression of another gene. _____ A pattern of inheritance in which modification of a gene during gamete formation permanently affects the phenotype of the individual. _____ A situation where one gene controls the expression of more than one character.
Each kidney contains about one million nephrons.
a. true b. false
Vascular tissue extends through the roots, stems, and leaves of the entire plant.
Answer the following statement true (T) or false (F)
Suppose you are estimating demand relationships, where you are attempting to identify the effect of price on quantity sold (i.e., Qi = ?0 + ?1Pricei + Ui). It will often be the case that the use of an instrumental variable for price will likely yield a coefficient (for ?1) that relates to the use of multiple regression in what way?
A. Is lower, because price and Ui are likely negatively correlated. B. Is lower, because price and Ui are likely positively correlated. C. Is higher, because price and Ui are likely negatively correlated. D. Is higher, because price and Ui are likely positively correlated.