Which of the following organisms does not require sunlight to live?
a. chemosynthetic bacteria
b. algae
c. trees
d. photosynthetic bacteria

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Creating new things to solve problems and improve life depends on the close interaction of which two fields?