Our skin feels alive, but the first 25 layers are actually made up of dead skin cells. Approximately how long does it take a new skin cell formed in the dermis to reach the outer edge of the epidermis? A.
1 day
B.
6 weeks
C.
3 days
D.
3 weeks

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water.b. they use chlorophyll and oxygen to make carbon dioxide and water.c. they use sunlight, water, and carbon dioxide to make sugars.d. they use sunlight, water, and oxygen to make chlorophyll.