Select the correct answer. Which of these is an example of structural protein in plants?
A. Chitin
B. Lignin
C. Keratin

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?

How can you approximate the number of calories required to keep you in energy balance?

Why may some young adults go through a quarter-life crisis? a. they are entering middle age and feel distressed about growing old. b. they feel insecure about themselves and their future. c. they have been promoted to more secure, better-paying jobs. d. they have developed more stable personal relationships.