Fish 3

Question 1

How do fish solve the problem of water being dense and viscous?

Answer 1

Streamlining and efficient locomotion

Question 2

What are the two main forms of propulsion?

Answer 2

Undulatory and oscillatory

Question 3

What are the characteristics of rover predators?

Answer 3

Constantly moving to search for widely dispersed prey. They have a fusiform, streamline body, terminal mouth and forked tailed. Their fins are evenly distributed

Question 4

What are the characteristics of ambush predators?

Answer 4

Acceleration specialists, they have a large gape, flexible torpedo-body, large peduncle for power, small pectoral and pelvic fins.

Question 5

What are the main characteristics of suction feeders?

Answer 5

Manoeuvring specialists. Large fins compared to body size. Small mouth, laterally compressed body. Spines for defence.

Question 6

Discussd the discovery of the Tiktaalik

Answer 6

Canadian arctic, 2004. Had a mobile neck, and its ear is structure to hear both in and out of water. It had a wrist which allowed tiktaalik to make its palm lie flat. It had large pectoral muscles, and eyes on the top of its head. It could travel awkwardly on land.