Why does ice float when it is placed in
a liquid water?
a. because the density of ice is greater than water
b. because the density of ice and water are the same
c. because the ice has a greater weight than water
d. because the density of ice is less than water

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

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 nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons