Over the past 200 years the level of carbon dioxide in the atmosphere has
a. decreased slightly
b. increased until recently, then decreased
c. increased steadily
d. stayed aboutbthe same

What is the role of fadh2 in cellular respiration

Many plants can reproduce asexually. which of these is an example of asexual reproduction in a plant? a. pine cones forming on a tree b. cross-pollination in a tomato c. roots sprouting from a potato d. night-blooming jasmine flowers

Are gametes exactly the same? explain why or why not?