How does cell differentiation contribute to the formation of new, different types of skin cells?
select one:

during cell differentiation, new proteins are expressed.

cell differentiation always causes old cells to die.

during cell differentiation, the number of cells increases.

cell differentiation increases the number of chromosomes.

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

Autonomous underwater explorers will be used to gather large-scale ocean information select the best answer from the choices provided ot

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.