Mammals

Question 1

What are mammals?

Answer 1

They have to breathe air

Question 2

What are Cetacea?

Answer 2

Whales and dolphins

Question 3

What are Cetacea most closely related to?

Answer 3

Hooved animals (ungulates)
Mesonyx is the proposed ancestor

Question 4

What are the 2 types of Cetecae?

Answer 4

Mysticetes - whales

Odontocetes - dolphins and porpoises

Question 5

What are Mysticetes?

Answer 5

Large
Instead of teeth they have baleen plates that hang from the upper jaw
They filter feed
Migrate huge distances
Makes use songs to communicate and attract mates
Communicate with low frequency sound - 10-20 Hz

Question 6

What are Odontocetes?

Answer 6

Pilot whale - short broad jaws - powerful for large prey

Long narrow jaws for fast closing

Question 7

What are the smallest odontocetes?

Answer 7

Porpoises - live coastally and feed frequently - heat loss due to small surface area

Question 8

What are the largest Odontocetes?

Answer 8

Sperm whales - females stay in the tropics while the males migrate

Question 9

What are the fresh water and ice Odontocetes?

Answer 9

River dolphins

Narwhals

Question 10

How do Odontocetes find prey?

Answer 10

Echolocation

Question 11

What are sirenians?

Answer 11

Fully aquatic grazers in shallow waters

Manatees and Dugongs

Question 12

What are Pinnipeds?

Answer 12

Seals, Lions and Walruses

Most closely related to dogs

Question 13

What is a odobenidae?

Answer 13

Walrus

Question 14

What are Phocidae?

Answer 14

Harbour and grey seals

Question 15

What are Otariidae?

Answer 15

Eared seals, fur seals and sea lions