What is better able to dissolve oxygen and nutrients than standing water?
Options:
- (A) puddles
- (B) microorganisms
- (C) ponds
- (D) nitrogen
- (E) swamp vegetation
- (F) Veins and arteries.
- (G) streams and creeks
- (H) peachleaf willow
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Let's think first: Running water is better able to dissolve oxygen and nutrients than standing water. Streams and creeks provide running water. Streams and creeks are better able to dissolve oxygen and nutrients than standing water.... So the answer is [(G)]

What kind of animal doesn't have a respiratory or excretory system?
Options:
- (A) a fish
- (B) bears
- (C) ant
- (D) whale
- (E) humans
- (F) starfish
- (G) mammals
- (H) llama
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Let's think first: Echinoderms lack respiratory and excretory systems. Starfish and sea urchins are also echinoderms. Starfish lack respiratory and excretory systems.... So the answer is [(F)]

How many times can cells split into parts?
Options:
- (A) As many times as it likes
- (B) massive damage
- (C) No times
- (D) An infinite number of times
- (E) heat produced
- (F) during the day
- (G) Temperature changing
- (H) A set number of times
--
Let's think first: Cells are programmed to divide only a set number of times. Parts means something has been divided. Cells are programmed to split into parts only a set number of times.... So the answer is [(H)]

Bacteria causes what to be harmed?
Options:
- (A) plants
- (B) electronics
- (C) fossils
- (D) humans
- (E) animals
- (F) viruses
- (G) food
- (H) the skin
--
Let's think first: Plants respond to daily and seasonal cycles and to disease. Plant diseases cause by bacteria. Plants respond to seasonal and daily cycles and to bacteria.... So the answer is [(A)]

Cells are what, so they are the building blocks of organisms?
Options:
- (A) Most plants
- (B) so small
- (C) all matter
- (D) homogenous
- (E) so deadly
- (F) so fortunate
- (G) so big
- (H) bacteria
--
Let's think first: Cells are the microscopic building blocks of organisms. Cells are so small that they can only be seen under a microscope. Cells are so small, they are the building blocks of organisms.... So the answer is [(B)]

Lipid stores are used by plants and animals for what?
Options:
- (A) energy.
- (B) liver
- (C) glycoproteins
- (D) survival
- (E) energy
- (F) growth
- (G) blood sugar
- (H) food
--
Let's think first: Organisms use lipids to store energy. Plants and animals are organisms. Plants and animals use lipids to store energy.... So the answer is [(E)]