Which of the following characteristics of eukaryotic cells is used to support the theory that they evolved from the union of free-living cells? A. The ability to transport materials across a membrane
B. The presence of mitochondrial DNA
C. Reproduction by mitotic cell division
D. Differentiation of stem cells into specialized cells

Plz ! a frog has a genetic mutation in skin cells that causes part of its skin to turn orange the frog will not pass this genetic mutation onto its offspring because, a. the offspring will inherit skin cells from the other parent. b. mutated skin cells cannot divide and produce daughter skin cells. c. skin cells do not contribute genetic material to sex cells. d. parents do not contribute genetic material to their offspring.

Immature bone cells, or osteoblasts, manufacture a protein called osteoid as well as several hormones. because of this, we would expect osteoblasts to contain numerous a) nuclei. b) ribosomes. c) lysosomes. d) golgi bodies.

Which could be a pathway of food through an ecosystem