MODULE 2: Organisation of living things

Question 1

What is a Unicellular organism

Answer 1

made up of only one cell that carries out all of the functions needed by the organism

Question 2

What is a Multicellular organism

Answer 2

use many different cells to function.
E.g: human beings, plants, animals, birds, and insects

Question 3

What is a Colonial organism

Answer 3

A colony of single-cell organisms is known as colonial organisms
E.g: Colonial organisms can be unicellular

Question 4

Structure/Function of a Tissue

Answer 4

Groups of cells with similar functions.
They perform functions as a group of cell

Eg. Muscle Tissue

Question 5

Structure/Function of a Systems

Answer 5

Groups of organs that function together as a coordinated system to perform a role for the body.

Eg. Digestive system

Question 6

Structure/Function of a Organs

Answer 6

Made up of groups of tissues that function as a whole

Eg. The stomach

Question 7

Explain Autotrophs

Answer 7

(PLANTS) create make their own food through photosynthesis

Question 8

Explain Heterotrophs

Answer 8

(ANIMALS)use cellular respiration for energy production

Question 9

Structure of Leaves

Answer 9

Absorb light. Where photosynthesis and gas exchange occurs. Control water levels.

Question 10

Explain Stem

Answer 10

Provides support and keeps the leaves in light. Also a pathway for the transport of nutrients and gases

Question 11

Explain Roots

Answer 11

Anchors the plant body to the ground. Absorb water and inorganic materials via osmosis and diffusion. Store food and nutrients.

Question 12

Explain Stomata

Answer 12

Allow intake of CO2 and prevent water loss. When the guard cell is full of water they open and intake gas. When water is lost they close

Question 13

Steps of Photosynthesis

Answer 13

1. Water is absorbed into the roots
2. Transported along the xylem
3. CO2 enters through the stomata then travels through mesophyll to the palisade tissue
4. Water by osmosis and CO2 by diffusion enters to the palisade and then the chloroplasts
5. Chlorophyll absorbs light into the chloroplasts
6. Products are converted into glucose.

Question 14

what does Xylem do

Answer 14

Transport sugars
Up or down (source and sink)
Thinned wall, contained sieve plates and companion cells
Outer side of vascular bundle

Question 15

what does Phloem do

Answer 15

Transport water and minerals
Up only
Thick lignin walls. Continuous
Centre of vascular bundle