During puberty, you may notice your hair and skin becoming more oily. this is because the glands and pores produce more
a. sebum
b. selenium
c. dandruff
d. dentrites

Which of the following is a main difference in cell structure between an onion cell and a human cheek cell? a. an onion cell contains one nucleus, whereas a human cheek cell contains two nuclei. b. an onion cell has a cell wall. c. a human cheek cell contains chloroplasts. d. there is no difference between an onion cell and a human cheek cell. you for your.

Which of the following is an example of this type of co-evolution

Describe how alleles and genes are related