Although there are a limited number of amino acids, many different types of proteins exist because ?
a: size if a given amino acid can very.
b: chemical composition of a given amino acid can very
c: sequence and number of amino acids is different
d: same amino acid can have many different properties

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16