Marine Mammals

What characteristics do most mammals have in common? Choose all that apply.

• Hair on some part of the body.

• Nourish young with milk

• Cold blooded

• Give birth to live young

Scientists believe that marine mammals evolved from __________ mammals.

Marine mammals face many challenges in order to live in their environment. In order to overcome these challenges, they use multiple ___________.

• Ideas

• Solutions

• Adaptations

• Echolocations

Because marine mammals live in ___________ water, they must generate _______ in order to maintain their body temperatures.

• cold, low amounts of energy

• cold, high amounts of energy

• warm, low amounts of energy

• hot, high amounts of energy

Because water is more dense than water, marine mammals must generate ___________ in order to __________.

• A low amount of energy, move in the water.

• A high amount of energy, move in the water.

• A low amount of energy, fly.

• A high amount of energy, fly.

Land mammals have an easier time taking in oxygen compared to marine mammals.

• True

• False

Marine mammals must take in high amounts of oxygen to survive. They do so by using their _________.

• Gills

• Lungs

• Brains

• Flippers

Marine mammals have adaptations that help them live in depths of high pressure.

• True

• False

Compared to land mammals, marine mammals have a heightened sense of smell, sight, and hearing.

• True

• False

Which of the following describes seals? Choose all that apply.

• Ear holes, no flaps

• Flippers that point backward

• Able to sit upright and run

• Cannot easily rotate their tails