question... What is used as energy by most of the organisms on earth
Options:
- (A) sugar
- (B) heat
- (C) food
- (D) water
- (E) Light
- (F) Energy
- (G) salt
- (H) carbon
answer... Glucose is used for energy by the cells of most organisms. Blood Sugar Glucose is sugar. Sugar is used for energy by the cells of most organisms.
The answer is (A)

question... This process is always more complex in eukaryotes than prokaryotes
Options:
- (A) eukaryotic infection
- (B) mitosis
- (C) kinetic
- (D) movement
- (E) breathing
- (F) recycling
- (G) photosynthesis
- (H) relocation
answer... Cell division is more complex in eukaryotes than prokaryotes. Mitosis is cell division. Eukaryotes have more complex mitosis than prokaryotes.
The answer is (B)

question... One example of an annelid has how many hearts?
Options:
- (A) three
- (B) Five
- (C) white
- (D) warm
- (E) four
- (F) strong
- (G) long
- (H) small
answer...
Annelids are worms such as the familiar earthworm. An earthworm has five hearts. An animal that has five hearts is an annelid.
The answer is (B)