Unit 10 AS2

Dean is concerned his aquarium air pump is not working properly. Whatdoes he most likely see that suggests this concern?

• Reduced bubbles rising from the air stone at the floor of the aquarium

• Decaying feed materials on the floor of the aquarium

• Fish swimming close to the bottom of the aquarium

• Plants rooted in the gravel at the floor of the aquarium

What is a major difference between amphibians and reptiles?

• Reptiles have scales; amphibians do not have scales.

• Reptiles are cold-blooded; amphibians are warm-blooded.

• Reptiles lay eggs; amphibians do not lay eggs.

• Reptiles live in water; amphibians live on land.

What is a popular freshwater aquarium fish that gives birth to up to 50live fry each time?

• Guppy

• Betta

• Goldfish

• Koi

Which is true of betta fish?

• Often kept alone in an aquarium

• Live in saltwater aquariums

• Need two males per aquarium

• Prefer cool-water aquariums

Mollies are freshwater fish that are known for their:

• black color and large fins.

• orange color and white bands.

• red color and long tail.

• silver color and black stripes.

Which is true of clown fish?

• Orange fish with white bands, edged in black, encircling its body

• Live in cold-water aquariums

• Live in freshwater aquariums

• Silver fish with three black vertical stripes on each side

Species aquariums have only:

• one kind of fish living in them.

• freshwater fish living in them.

• saltwater fish living in them.

• tropical fish living in them.

Susan avoids wasting fish feed by feeding her fish only the amount theycan eat in four minutes. To make certain her fish get enough to eat, shefeeds them:

• three times a day.

• once a day.

• once a week.

• three times a week.

Which is true of saltwater fish, but not true of freshwater fish?

• Saltwater fish need to drink water, but freshwater fish do not need todrink water

• Saltwater fish do not have scales, but freshwater fish do have scales.

• Saltwater fish are not colorful, but freshwater fish are very colorful.

• Saltwater fish have dorsal fins, but freshwater fish do not have dorsalfins.

Which is true of angelfish?

• Hardy saltwater or freshwater fish

• Hardy fish for cool-water ponds

• Tender fish suited to freshwater

• Tender fish suited to salt water