Enzymes act as
A. substrates.
B. catalysts.
C. products.
D. catabolites.
B
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Which of the following is not a type of tissue found in an animal?
A. ground B. connective C. epithelial D. muscle
The figure shows the evolution of HIV and SIV. Choose the true statements about the evolution of HIV (Select all that apply).
_____ All strains of HIV are included within clades with SIV strains.
_____ A strain of HIV is never more closely related to another strain of HIV than it is to a SIV strain.
_____ Humans acquired different subtypes of HIV from different primate hosts.
_____ HIV-1 group O is more closely related to SIV-chimpanzee than SIV-gorilla.
_____ All strains of SIV are included within clades with HIV strains.
Cardiovacular disease is linked to gum disease or __________
Fill in the blank(s) with the appropriate word(s).
The homeless in the United States are at increased risk of undernutrition. Which of the following is true about the homeless?
Select one: a. Most of them are alcoholics. b. Most of them are lazy. c. Many are members of families with children. d. All are poorly educated.