Which of the following is not part of the integumentary system a. skin b. cartilage c. nails d. hair

Which event would lead to primary succession of a forest?

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled