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Question 1

Calc change in mass

Answer 1

D/o x 100

Question 2

How many chromosomes in a human?

Answer 2

46

Question 3

Three main stages of cell cycle

Answer 3

1. replication of dna and synthesis of organelles
2. mitosis
3. division of cell

Question 4

Why is mitosis important

Answer 4

Produces identical cells which all have the same genetic information
Produced additional cells for growth and repair

Question 5

What are pathogens?

Answer 5

Pathogens are microorganisms that cause disease
Examples:
Bacteria-produce toxins that damage cells like salmonella
Viruses- invade cells and reproduce inside them
Fungi- can grow and spread like athletes foot
Protists- Single celled organisms e.g malaria

Question 6

What’s a non communicable disease

Answer 6

Diseases that cannot be spread between people. They are often caused by lifestyle, genetics, or environmental factors.
Examples:
Cancer
Diabetes
Heart disease

Question 7

Transmission types

Answer 7

How pathogens are spread from one host to another
Main transmission methods:
Direct contact
Airborne
Waterborne
Foodborne
Vectors(insects)

Question 8

What are some communicable diseases?

Answer 8

• Bacterial: Salmonella (food poisoning), Gonorrhoea (STD).
• Viral: Measles (rash, fever), HIV (weakens immune system).
• Fungal: Rose Black Spot (affects plants, damages leaves).
• Protist: Malaria (spread by mosquitoes, causes fever).

Question 9

Non-Communicable diseases

Answer 9

• Cancer – Abnormal cell growth.
• Diabetes – Affects blood sugar control.
• Cardiovascular Disease – Affects heart and blood vessels.