Plants And Animals

Question 1

What are the three germ layers?

Answer 1

Ectoderm, mesoderm, endoderm

Ectoderm gives rise to skin and nervous system, mesoderm forms muscles and skeleton, endoderm develops into digestive and respiratory systems.

Question 2

What does the ectoderm give rise to?

Answer 2

Skin and nervous system

Question 3

What does the mesoderm give rise to?

Answer 3

Organ systems

Question 4

What does the endoderm give rise to?

Answer 4

Digestive and respiratory systems

Question 5

What are some key differences between plants and animals?

Answer 5

Cell structure, nutrition, reproduction, growth patterns

Plants have cell walls and chloroplasts, while animals do not. Plants are usually autotrophic, whereas animals are heterotrophic.

Question 6

Describe characteristics of porifera (sponges).

Answer 6

Simple body structure, porous body, lack true tissues and organs

Sponges are sessile and primarily live in aquatic environments.

Question 7

How do porifera (sponges) eat?

Answer 7

Filter feeding through water flow

Sponges draw water through their porous bodies and filter out food particles.