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

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

Select the correct answer from each drop-down menu. during the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.)chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.