Which of the following is a feature of all cells? O A. All cells have a nucleus.
O B. All cells have a rigid cell wall.
O C. All cells are spheres.
O D. All cells have a cell membrane.

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?