Random bits from exams

Question 1

How can you ensure cultures grow successfully after initial culture established?

Answer 1

After the initial culture is established

• ensure aseptic conditions are kept to prevent contamination
• maintain optimum pH
• provide them with repiratory substrates

Question 2

give a type of gene

Answer 2

Examples of different types of genes

-regulatory genes

Question 3

How do fish have lots of surface area for gaseous exchange?

Answer 3

Fish have lots of lamellae

Question 4

How do insects have a large surface area for gaseous exchange?

Answer 4

Insects have many branched trachea and tubes

Question 5

Why may an organism need a gas exhnage system?

Answer 5

• Small surface area to volume ration
• in short supply of oxygen
• rate of diffusion would be insuffienent

Question 6

3 types of adaptation?

Answer 6

Types of adaptation:

• anatomical (structural, appearance)
• Behavioural
• Physiological (correct functioning of cell processes)