2. Levels of organization and cell structure

Question 1

Multicellular Organisms

Answer 1

Definition: An organism with many cells.
Example: Humans, animals, plants.

Question 2

Unicellular organisms

Answer 2

Definition: Organisms with one cell.
Example: Amoeba, bacteria

Question 3

What is the cellular hierarchy

Answer 3

Sequence: Organelles → Cells → Tissues → Organs → Organ Systems.

Question 4

Organelles

Answer 4

Definition: Structures inside a cell.
Example: Nucleus, mitochondria, chloroplast.

Question 5

Cells

Answer 5

Definition: Basic unit of structure and function of living organisms.
Example: Animal cells, plant cells.

Question 6

Tissues

Answer 6

Definition: Cells with a similar function grouped together.
Example: Muscle tissue, nerve tissue.

Question 7

Organs

Answer 7

Definition: A collection of several tissues carrying out a particular function.
Example: Heart, lungs.

Question 8

Organ Systems

Answer 8

Definition: Group of organs that carry out a function.
Example: Respiratory system, circulatory system.

Question 9

The function of the nucleus?

Answer 9

Controls cell activities

Question 10

The function of the cell membrane?

Answer 10

Controls what enters and leaves the cell

Question 11

Function of Cytoplasm

Answer 11

Cytoplasm: Place where chemical reactions take place.

Question 12

Function of chloroplast

Answer 12

Contains chlorophyll for photosynthesis

Question 13

Function of mitochondria

Answer 13

Respiration to release energy

Question 14

Function of cell wall

Answer 14

Supports and maintains cell rigidity

Question 15

Function of vacuole

Answer 15

Contains sap keeping the cell firm

Question 16

Function of ribosomes

Answer 16

Makes proteins through protein synthesis

Question 17

What are the similarities of plant and animal cells?

Answer 17

They both have
Nucleus
cytoplasm
mitochondria