Cell Diversity And Tissues

Question 1

What is a uni-cellular organ?

Answer 1

Made up of one cell only

Question 2

Give 3 examples of unicellular organs

Answer 2

1.Bacteria
2.amoeba
3.yeast

Question 3

What is a multicellular organ?

Answer 3

Made up of many cells

Question 4

Give 3 examples of multicellular organs

Answer 4

1.Animals
2.Plants
3.Mushrooms

Question 5

What is a tissue?

Answer 5

Group of cells adapted to the same function

Question 6

What are 4 examples of plant tissues?

Answer 6

1.Dermal
2.Ground
3.vascular
4.Meristematic

Question 7

Give 4 examples of animal tissues

Answer 7

1.Epithelial
2.Connective
3.Muscular
4.Nervous

Question 8

What is the function of muscular tissue?

Answer 8

Contractile-Ability to shorten itself

Question 9

What is muscular tissues adaptation?

Answer 9

Cells have many mitochondria providing energy [brain and spinal cord]

Question 10

What is nervous tissues function?

Answer 10

Carries impulses to and from central nervous system [brain and spinal cord]

Question 11

What is the nervous tissue adaptation?

Answer 11

Covered in a myelin sheath to speed up Impulses

Question 12

What is an organ?

Answer 12

Different tissues working together

Question 13

Give an example of plant organ

Answer 13

Leaf

Question 14

Give an example of an animal organ

Answer 14

Heart

Question 15

What is a organ system?

Answer 15

Different organ working together

Question 16

Give 3 examples animal systems

Answer 16

Digestive,Circulatory, Nervous

Question 17

What is tissue culture?

Answer 17

Artificial growth of tissues outside an organism

Question 18

Name 3 conditions necessary for successful tissue culture

Answer 18

1.Sterile
2.Nutrient medium
3.Growth promoters

Question 19

Why is a sterile environment required for successful tissue culture?

Answer 19

Free from microorganisms

Question 20

Give 3 uses of applications organ tissue culture

Answer 20

1.Micropropagation[plant breeding]
2.cancer research
3.skin grafting

Question 21

What is micropropagation?

Answer 21

Growth of large numbers of plants from simple tissues/cells

Question 22

How is micropropagation achieved?

Answer 22

1.Cells from parent plant and grown in a sterile environment
2.Clump of cells called a callus forms and then a plant embryo
3.Nutrient medium changed and adult plant forms

Question 23

Give 2 advantages of micropropagation

Answer 23

1.Large number of plants grown in a short amount of time
2.Healthy parent plant means healthy crop

Question 24

Give 2 disadvantages of micropropagation

Answer 24

1.Expensive
2.Defected parent plant will mean defeated crop