Which type of muscle is responsible for constricting the walls of blood vessels?
a. striated involuntary muscle
b. striated voluntary muscle
c. nonstriated involuntary muscle
d. nonstriated voluntary muscle

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

not sure if this is what you'r looking for nnew= nold

true is the