Which tissue contains a calcified ground substance and is specialized for structural support?
a. muscle tissue
b. dense regular connective tissue
c. areolar connective tissue
d. bone connective tissue

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

2polnis which of the following is an advantage of an in vitro experiment?me

Choose the best definition of allele. a. one of several possible versions of a gene, which each produce a different phenotype b. an organism that's purebred for a given trait c. the process of fertilizing a plant with pollen from another plant d. a set of genes that are located on the same chromosome and so are tightly linked