Primary immunodeficiency diseases
A. develop later in life.
B. are detectable close to birth.
C. may be caused by malnutrition.
D. are never associated with genetic defects.
E. are sometimes caused by severe stress.
Answer: B
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Flowering plants originated during the
A. Permian Period. B. Tertiary Period. C. Devonian Period. D. Cretaceous Period. E. Jurassic Period.
An atom that gains or loses electrons becomes
a. more stable. b. an ion. c. a molecule. d. unable to form bonds. e. radioactive.
Variations in genes are called ________. Examples of these variations include eye color. There are blue eyes, green eyes, brown eyes, and several combinations of these.
A. polymorphisms B. alleles C. traits D. homeologues
Suppose you've regressed profits across stores (i) in Indiana and Michigan over two years (t) on an Indiana dummy variable as well as on an interaction between an Indiana dummy variable and Year 2 dummy variable. Thus, your regression equation is: Profitsit = ?0 + ?1Indianait + ?2Year2it Indianait + Ui. What is the marginal effect of a store being in Indiana based off this regression equation?
A. ?1 + ?2 × Year2it B. ?0 + ?1 C. ?2 D. ?0 + ?1 + ?2