Biology Session 2 Day 2 review

You found an organism in the water that has gills, no legs, has fins, and scaly skin. What type of organism would best fit these characteristics?

• Bird

• Mammal

• Fish

• Amphibian

You found an organism that lives near water, sunbathes to warm its body temperature, slimy moist skin, and walks on 4 legs. Which type of organism best fits these characteristics?

• Fish

• Mammal

• Bird

• Amphibian

You found an organism that lives in trees, has feathered wings, and can fly. Which type of organism best fits these characteristics?

• Fish

• Bird

• Mammal

• Amphibian

Which of the following are characteristics of mammals?

• Hair/fur

• Endotherms

• Milk produced in mammary glands

• Fins

• Gills

You found an organism that lives in trees, has fur, and can produce milk from its mammary glands for its offspring. Which type of organism best fits these characteristics?

• Fish

• Bird

• Mammal

• Amphibian

What are placental mammals?

• Animals that have a gestation (pregnancy) period inside the mother's uterus; named for the placenta that develops during pregnancy

• Mammals with a short developmental period inside the mother followed by a second developmental period in a special pouch

• a mammal that reproduces by laying eggs, but still has milk, hair, and teeth

• None of the above

Approximately what percent of mammals are placental mammals?

• 100%

• 0%

• 38%

• 95%

TRUE OR FALSE: Humans are placental mammals.

• True

• False

What are marsupials?

• Animals that have a gestation (pregnancy) period inside the mother's uterus; named for the placenta that develops during pregnancy

• Mammals with a short developmental period inside the mother followed by a second developmental period in a special pouch

• a mammal that reproduces by laying eggs, but still has milk, hair, and teeth

• None of the above

Which of the following is NOT a marsupial

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