Questions Corrections 2021

Question 1

Explain why the temperature near the brain decreased when the ice cold water was drunk

Answer 1

Blood is cooled at the stomach
And the cooled blood flows to the brain

Question 2

The rate of sweating decreases, explain how this change helps maintain the persons normal body temperature

Answer 2

Less sweating occurs
So less heat is lost

Question 3

Describe how microorganisms in the layers of soil help recycle chemicals in the dead plants
How the chemicals are used again by living plants

Answer 3

Microorganisms:
Digestion of the dead plants by enzymes they then respire producing CO2 which released mineral ions

In plants
Carbon dioxide is taken in by leaves by diffusion via the stomata
CO2 is used in photosynthesis to make glucose
Ions are taken in by roots via active transport, nitrate ions are used for making amino acids and phosphate for DNA

Question 4

Abiotic vs Bitoic meaning and example

Answer 4

Abiotic is non living so nitrates in the soil
Biotic is living so rabbits eating the plants

Question 5

How should the student decide where to place the quadrant

Answer 5

Coordinates
To achieve randomness

Question 6

Give two reasons why using the mean to calculate the number of daisy plants on the lawn may not be accurate

Answer 6

Too few quadrants
Sample may not be representative

Question 7

Classification group list in order:

Answer 7

Kingdom
Phylum
Class
Order
Family
Genus
Species