Theme 3 Part 2

Question 1

What happens to SA:v ratio as animals get larger

Support is ___- dependent
Mass is ______ dependent

Answer 1

Decreases

Area
Volume

Question 2

What is isometric scaling

Answer 2

Proportions stay the same (all oarts grown in same proportion to each other)

Slope = 1

Question 3

What is allometric scaling

Answer 3

Disproportionate

Some part of animal are getting larger disproportionate to other parts

Question 4

When animals grow larger what needs to happen to their limbs

Answer 4

The limbs dimensions need to change to support the mass of the large animal

The limbs need to be directly below the animal. Instead sprawling stance like the ant

Question 5

As body size increases , the skeleton size ____

Answer 5

Disproportionally Increases more

Slope greater than 1

Question 6

As body size increases , the metabolic rate ____

Answer 6

Derecreaes more

Since SA is increasing less than volume is , it needs less energy to stay warm so it does less metabolic rate

Slope less than 1

Question 7

What is kleibers law

Answer 7

As things get larger, metabolic rate decreases more

Question 8

How does the skeleton develop when going to land

Answer 8

Stronger limbs
Thick and heavy rib cages that enclosed the lungs and organs to support the weight

Articulated spine to support the limbs, spine attached to pelvic and pectoral girdles (spine connected to skull in fish tho)

Mobile neck

Question 9

How does the stance change when moving to land

Answer 9

Small animals have a sprawling stance (need less support) legs on sides

Large animals have erect stance (bone can now support mass of the body)

Question 10

What are max speeds limited by

Answer 10

Mass

Too light, too slow

Too heavy, too slow

Regular mass, faster

Question 11

Why did whale go back to water?

Answer 11

At first being larger was better, but since as land evolved, they’re too big to stay on land