Zoology Answers

The phylum Chordata includes a diverse group of vertebrates and
some marine invertebrates what evidence supports their common ancestry?

Why is the respiratory system of birds unique and what are the advantageous to this kind of
system and what circulatory system adaptations do both groups
have?

Name and motivate the most important evolutionary step which distinguishes reptiles from amphibians.

Discuss the fossil evidence and advantages of hominid bipedalism, ability to walk upright.

Name the orders as well as the most important features of members of the surperorder Paenungulata.

Given below are data on the breathing rate, heart rate and body temperature of four different mammals, A to D.



Animals

Breathing rate

(inhalations/min)

Breathing rate

(inhalations/min)

Body temperature

(°C)

A

160

500

36,5

B

15

40

37,2

C

28

190

38,2

D

8

28

35,9



Rank animals A to D in descending order for surface area per unit volume of the body and in descending order for total volume of blood in the body:

4. How do endodermal cells differ from the other root cells?

3. Which of the two root systems is most advantageous to the plant? Explain.

2. What is the function of the vascular cambium?

1. What are adventitious roots? Give examples of plants with this type of root.