Why do some leaves turn yellow or orange in the fall?

A) to attract beneficial insects

B) because the chlorophyll pigment has broken down

D) because the carotenoid pigment has increased

Viruses A. usually infect only specific types of cells. B. reproduce on their own and sometimes within hosts. C. are nonliving particles. D. are able to crystallize.

Describe two different types of eukaryotic asexual reproduction

Enzymes are catalyst. Thid means that they are able to speet up chemical reactions

What power do citizens group have that may make legislators take their environmental views more seriously? A. Their leaders can for office B. Their members vote in elections C. They can give interviews to the media D. They have a great deal of money

A cell is described as being n = 50. this means that

A farmer crossed a yellow maize plant (Yy) with another yellow maize plant (YY). He planted 200 seeds from this cross. How many of the plants would be yellow?

How do the methods of scientists lead to knowledge?

Actions you do without thinking about them

Joe begins to experience mood swings and disturbed thirst and hunger. Imaging studies indicate that a brain tumor is the likely cause of these disorders. In what part of the brain is the tumor most likely located?

How to use light in energy to make glucose?