Science (DNA And Varation And Evolotion And Inhertnace )

Question 1

What is the structure for DNA

Answer 1

Double helix because they are two strands of DNA

Question 2

Where is DNA found

Answer 2

Nucleus

Question 3

What are genes

Answer 3

Genes code for particular sequences of amino acids to make proteins

Question 4

What is genome

Answer 4

All the genetic material in a organism

Question 5

Gammet

Answer 5

Sex cells

Question 6

What cell division produce gammets

Answer 6

Meiosis

Question 7

What is fertilisation

Answer 7

When the sperm and egg mix

Question 8

What is asexual reproduction

Answer 8

1 parent (it only take 1 to make things ) and they always genetically to there parent

Question 9

What is a clone

Answer 9

A group of organisms that are genetically identical

Question 10

Disadvantage of asexual reproduction

Answer 10

If they get a disease all there offspring would die

Question 11

Advantage of sexual reproduction

Answer 11

If one gets a disease there offspring might not be affected

Question 12

Advantage of asexual reproduction

Answer 12

Less time consuming

Question 13

Disadvantage of sexual reproduction

Answer 13

Time consuming to find a partner

Question 14

What is mitosis use for

Answer 14

Growth ,repair , and asexual reproduction

Question 15

What is meiosis for

Answer 15

For gametes cell and sexual reproduction

Question 16

How many pairs of chromosomes decide what sex you are

Answer 16

1 pair

Question 17

What are males chromosome

Answer 17

Xy

Question 18

What are female chromosomes

Answer 18

Xx

Question 19

What are alles

Answer 19

the different versions of the smae gene

Question 20

What are enzymes

Answer 20

Cells that can’t work well with each-other if the conditions around them change too much

Question 21

Example of automatic control systems

Answer 21

Nervous system or hormones

Question 22

What is homeostasis

Answer 22

Homeostasis is defined as a self-regulating process by which a living organism can maintain internal stability while adjusting to changing external conditions

Question 23

What are respecter cells know as

Answer 23

Stimulus

Question 24

What does the stimulus do

Answer 24

Detects changes in environmental (internal condition)

Question 25

Example of a stimulus

Answer 25

The concentration of glucose in your blood

Question 26

What does co ordination centre do

Answer 26

They receive and passes the information from the stimulus

Question 27

Example of Co ordination centre

Answer 27

Brain , spinal cord , pancreas

Question 28

What is a effector

Answer 28

To carry out the response and restore the optimum level

Question 29

What is a example of a effector

Answer 29

A muscle or gland

Question 30

How many time does meiosis split

Answer 30

Two divisions

Question 31

How many times does mitosis split

Answer 31

One time

Question 32

Order of nervous pathway

Answer 32

Stimulus- receptor - sensory neuron -cns-motor neurons-effector -response

Question 33

Describe mitosis

Answer 33

2 daughter cells
The are genetically identical
Divides once
Daughter cells are the same as parent in humans 46 chromosomes
Growth and repair asexual reproduction

Question 34

Describe meiosis

Answer 34

Four daughter cells
Daughter cells are not genetically identical
Divide twice
Chromosome reduce by half so 23
Produce gannets for sexual reproduction

Question 35

Fossil could be

Answer 35

Remains of an organism has not decayed
Traces of organisms such as footprints and burrows