B1 and B2

Question 1

What is fertilization

Answer 1

When the sperm and the egg FUSE to form a zygote

Question 2

Function of mitochondria

Answer 2

Energy released for movement
using oxygen
using glucose

Question 3

Describe the route of an impulse through a reflex arc

Answer 3

A receptor detects a stimulus
sensory neurones then pass impulse to relay neurone
Relay neurone passes impulse to motor neurone
Motor neurone passes impulse to muscle
muscle initiates response

Mention Motor neurones in CNS

Question 4

What type of neuron is the optic nerve ?

Answer 4

sensory neuron

Question 5

Describe mitosis

Answer 5

When the cell divides 
two cells produced 
1 division 
cells are genetically identical 
Diploid

Question 6

How does an embryo develop

Answer 6

There are many cell divisions
growth of the organism
Embryonic stem cells will differentiate

Question 7

How is active transport and diffusion used in a plant

Answer 7

Active transport is used when mineral ions go into root hair cells
Diffusion is used when carbon dioxide diffuses in and oxygen diffuses out of the leaf

Question 8

2 types of mutation

Answer 8

Addition

Deletion

Question 9

Difference between electron and light microscopes

Answer 9

Light microscope can observe live cells but electron microscopes cannot .

Light microscopes have a lower resolution and magnification compared to electron microscope

Light rays used in light microscopes but a beam of electron used in electron microscope