Cell didvision,Cell diversity and cellular organisarion

Question 1

Biological significance of mitosis

Answer 1

1) Replacment of cells and repair of tissue
2) Asexual reproduction
3) Growth

Question 2

Types of changes that may occur when stem cells differentiate to produce specialised cells

Answer 2

1) Changes in the number of different organelles
2) Changes to the shape of the cell
3) Changes to the cell contents

Question 3

4 main types of animal tissue

Answer 3

1) Epithelial
2) Connective
3) Muscle
4) Nervous

Question 4

Epithelial

Answer 4

Single or layered

Role in lining cavities,ducts and tubes

Question 5

Connective

Answer 5

supporting role by joining tissues together

Question 6

Muscle

Answer 6

Movement

Question 7

Nervous

Answer 7

Transmission of nervous impulses

Question 8

Cells found in Xylem tissue

Answer 8

Tracheids
Vessel elements
Parenchyma
Fibres

Question 9

Cells found in Phloem tissue

Answer 9

Sieve tube elements
Companion cells
Parenchyma cells

Question 10

Function of Xylem tissue

Answer 10

Water transport and structural support

Question 11

Function of Phloem tissue

Answer 11

Transporting products of photosynthesis

Question 11

Organ

Answer 11

A collection of more than 1 tissue working together to perform a particular function e.g liver and heart

Question 12

Organ system

Answer 12

A number of organs working together to perform an overall life function eg digestive system