What elements make up molecules of sugar? a) carbon, hydrogen, oxygen, and nitrogen b) carbon, oxygen, and nitrogen c) carbon, hydrogen, and oxygen d) carbon and hydrogen

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

State officials are considering constructing a road through a forested wilderness area. this action will likely affect the forest ecosystem in various ways. part a: predict how the construction of a road could negatively affect plants and animals in that ecosystem. (3 points) part b: describe one way that the construction of a road could have a positive impact of the forest ecosystem. (1 point)

Approximately what portion of the foods that we eat have been genetically modified in some way? a. fewer than 10% b. about 50% c. nearly 100%