Biology Paper 2 Amber

Question 1

What is homeostasis?

Answer 1

How to body maintains a stable internal enviroment

Question 2

Why is homeostasis important?

Answer 2

Cells need to be kept at the right temprature to be efficent

Increasing the efficency of the body

Question 3

Give some examples of what homestasis controlls?

Answer 3

Body temprature
Blood glucose levels
Your water content

Question 4

What 3 things work together to maintain a steady body condition?

Answer 4

Receptors
Coordination centers
Effectors

Question 5

What are exampels of coordinating centers?

Answer 5

Brain
Spinal cord
Pancrease

Question 6

What is a gamete?

Answer 6

?

Question 7

What can Meiosis produce?

Answer 7

Gametes

Question 8

How do you make an gametes?

Answer 8

Meiosis

Question 9

How many chromosomes to gametes have?

Answer 9

Half the original amount

Question 10

In humans where does meiosis happen?

Answer 10

The reproductive organs - this is the only place where this happens

Question 11

What is the first step of meiosis?

Answer 11

It duplicated it’s genetic information forming two armed chromosomes

Each arm of the genetic information is identical to the other arm

The chromosomes then arrange themselfs into pairs

Question 12

What is the second step of Meiosis?

Answer 12

In the first division in meiosis the chromosome pairs line up in the center of the cell

Question 13

What is the third step in Meiosis?

Answer 13

The pairs of chromosomes are pulled apart and each new cell has some of the farthers and some of thr mothers chromosomes

Question 14

What is the forth step in Meiosis?

Answer 14

In a second division the chromosomes line up in the center of each cell agian and the chromosomes are pulled apart

Question 15

What is the product of meiosis?

Answer 15

You get 4 gametes each with only a single set of chromosoems in them

They ARE NOT GENETICLY IDENTICLE

Question 16

What happens when 2 gametes fuse together during fertilisation?

Answer 16

The resulting new cell divides by mitosis o create a copy of itself

Question 17

What normally happens meiosis?

Answer 17

Scince meiosis only happens in the sex cells if the egg has been fertilied by the sperm mitosis starts to happen and an embroy grows

Question 18

What h appens as an embrey starts to develope?

Answer 18

It’s cells start to differentiate and become specilised

Question 19

Deffine habitit?

Answer 19

A place where an organism lives

Question 20

Deffine population?

Answer 20

All the organisms of species living in 1 place

Question 21

Diffine community?

Answer 21

The population of different species living in a habitat

Question 22

Abiotic factors?

Answer 22

Non living factors of the enviroment

Question 23

Biotic factors

Answer 23

Livining factors of the enviroment

Question 24

Diffine ecoystem?

Answer 24

The interaction of biotic and abiotic factors parts of the enviroment

Question 25

What do plants and animals need from the enviroment?

Answer 25

Plants - light and space, minerals and water from the soil Animals - space, food, water and mates

Question 26

What is the challenge for animals and plants?

Answer 26

They need to compete for all of their resources

Question 27

What is interdependence?

Answer 27

How animals rely on other other things

Question 28

What is a stable community?

Answer 28

A community that had a population size that is roughly the same. It may increase and decrease in cycles

Question 29

Tive some exampels of an abitic factor?

Answer 29

``` Light intensity Moisture level Temprature Co2 levels Wind intensity or direction ```

Question 30

How could abiotic factors effect biotic factors?

Answer 30

Ph levels could change making the soil to acidity for plants to grown in

Question 31

Give some example of biotic factors?

Answer 31

New predetors Comprtition New pathogen Avilability of food

Question 32

How could biotic factors effect animals?

Answer 32

A new pathogen or prey could led to a higher death rate