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Flashcards in Failed Qs In Paper 1 Deck (18):
1

Why is adrenaline needed for running away from a predator?

It increases heart rate
T/F increases blood flow to the muscles

2

How can a specific breed be produced using selective breeding?

Breed X with other animals.

You will get some X and some normal.

Continue this for many generation with just the Xs

3

Function of the retina?

Receives light

4

How does keeping chickens in a factory affect egg production.

They move less
T/F
They respire less
T/F
Less heat is lost
T/F
They have more energy for egg production

5

Name some biotic factors that should be controlled in a experiment involving humans.

Age
Sex
Body mass
Health

6

How does EPO decrease tiredness?

More haemoglobin
On RBCs
Which carries the oxygen
When respiring aerobically
So there’s less oxygen debt.

7

What happens when pollen lands on the stigma?

When pollen grains land on the stigma of a flower of the correct species they germinate. A pollen tube grows through the tissues of the flower until it reaches an ovule inside the ovary. The nucleus of the pollen grain then passes along the pollen tube and joins with the nucleus of the ovule.
After fertilisation the female parts of the flower develop into a fruit. The ovules become seeds and the ovary wall becomes the rest of the fruit.

8

What happens to a plant cell if it’s put in a concentrated salt solution?

Water leaves the cell via osmosis (H-L)
The concentration of water in the cell goes from high to low, leaving the cell flaccid.

9

How is the palisade mesophyll layer adapted for P/S?

Many chloroplast which absorb the light

10

How is the spongy mesophyll layer adapted for P/S?

It has air spaces for the diffusion of gas

11

How are the guard cells adapted for P/S?

They can open or close the stomata allowing CO2 in for P/S

12

What happens if a plant is left in a dark cupboard?

The starch gets used up

13

What are similarities between phototropism and reflexes in animals?

Chemicals involved
Receptors involved
Effectors involved

14

Differences between phototropism and reflexes in humans?

Chemical vs electrical
Fast (animal) slow (plant)
Muscle contractor vs plant growth

15

Number of chromosomes in the unfertilised gamete is...

23- diploid

16

What molecule does fungus use to store carbohydrates?

Glycogen

17

What are the thread-like structures that make up the mycelium of a fungus?

Hyphae

18

How can enzymes be used to genetically modify plants?

Restriction enzymes- removing DNA
Ligase- joins DNA