Which of the following statements is incorrect?
a) tactile cells anchor the skin to the underlying structures of the body.
b) dendritic cells ingest foreign substances and activate the immune system.
c) melanin protects the nuclei of keratinocytes against ultraviolet (uv) radiation.
d) keratinocytes produce a fibrous protein that gives the epidermis its protective properties.

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.

Which characteristics are typical of a human population in the postindustrial stage?

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .