Unit 2.a: Levels Of Organisation

Question 1

Order

Answer 1

• Organelle,
• cell,
• tissue,
• organ,
• organ system,
• organism

Question 2

What is an organelle?

Answer 2

It is a subunit of a cell and each one has a specific function.

Example: nucleus, cell membrane, mitochondria.

Question 3

What is a cell?

Answer 3

It is a building block of file. Each cell is made of organelles. Specialised cells are adapted to their function and the organelles can vary.

Examples: red blood cell, egg cell, root hair cell

Question 4

What is a tissue?

Answer 4

It is a group ol similar cells that work together to perform a specific function.

Example: blood, muscles, epithelial tissue.

Question 5

What is an organ?

Answer 5

It’s a group al similar tissues working together to perlom a specific function.

Example: veins, heart, lungs.

Question 6

What is an organ system?

Answer 6

It’s a group al similar organs working together to perform a specific function.

Example: circulatory, muscular, respiratory.

Question 7

What is an organism?

Answer 7

It’s a group of organ systems working together to carry out the lite processes.

Examples: humans, plants and animals.