Which was not developed in the 1800s? scientific method

natural selection

cell theory

germ theory

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.

Chitin is a chemical component of the cell walls