1&2 Lecture

Question 1

List the properties of animals

Answer 1

•Multicellularity : body is made up of Many cells
•Heterotrophs : dependent on others for food
•Holozoic ( holo: complete) mode of nutrition: first complete food is eaten/ingested then digested.
Grown, reproduction, movement etc

Question 2

How many cells perform activities in unicellular organisms? And for what

Answer 2

One single cell performs activities like digestion, respiration, reproduction etc necessary for its survival

Question 3

What does multicellularity help in?

Answer 3

Multicellularity helps with division of labour meaning work is divided among many cells

Question 4

What is tissue

Answer 4

Group of similar cells with intercellular/extra-cellular substance performing a specific function

Question 5

On what basis are the tissues classified into 4 types

Answer 5

Structure and function

Question 6

The four types of tissues:

Answer 6

Epithelial, connective, muscular, neural or nervous tissue

Question 7

Do different organs have the same proportion of these 4 tissues?

Answer 7

No different organs have different proportions of these tissues

Question 8

What is the organ system? Explain with an example

Answer 8

When 2 or more organs interact physically(organs are connected to each other) and chemically(by releasing enzymes, hormone etc), they form an organ system.
Example: digestive, respiratory etc