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)]

Amphibians have what sort of sensing system?
Options:
- (A) strong
- (B) retina
- (C) four limbs
- (D) chemical
- (E) mechanical
- (F) the eyes
- (G) nerves
- (H) heat or cold
--
Let's think first: Amphibians have sense organs to smell and taste chemicals. Smell and taste belong to our chemical sensing system. Amphibians have a chemical sensing system.... So the answer is [(D)]

Running water is able to do what to minerals and oxygen?
Options:
- (A) evaporation
- (B) dissolve them
- (C) reducing acid rain
- (D) recycling
- (E) clean them
- (F) separate them
- (G) hydration
- (H) cool them
--
Let's think first: Running water is better able to dissolve oxygen and nutrients than standing water. Mineral nutrients are interrelated. Running water is better able to dissolve oxygen and minerals than standing water.... So the answer is [(B)]

What phylum do starfish belong to?
Options:
- (A) fertile
- (B) animals
- (C) Echinoderm.
- (D) Mollusca.
- (E) Sponge.
- (F) Absorb light
- (G) Annelid.
- (H) a fish
--
Let's think first: Echinoderms have a unique water vascular system with tube feet. Each starfish arm is lined with tube feet. Starfish are echinoderms.... So the answer is [(C)]

Producers use energy and inorganic molecules for what?
Options:
- (A) neutralizing threats
- (B) dismissal of nutrients
- (C) heat produced
- (D) Transfers energy
- (E) retention of nutrients
- (F) decomposition
- (G) agriculture
- (H) iron in water
--
Let's think first: Producers use energy and inorganic molecules to make food. Food preparation for retention of nutrients is included. Producers use energy and inorganic molecules for the retention of nutrients.... So the answer is [(E)]

What can hpv cause?
Options:
- (A) a hazard
- (B) harm
- (C) cancer
- (D) sweating
- (E) heightened abilities
- (F) anemia
- (G) good health
- (H) comfort
--
Let's think first: Some viruses can cause cancer. Human papillomavirus, or HPV, is the name of a group of viruses. HPV can cause cancer.... So the answer is [(C)]