Specialised Cells

Question 0

Stem cells?

Answer 0

Cells which can divide and have the potential to become different types of cells, they are needed for growth and repair in animals

Question 1

State the order that makes an organism

Answer 1

Cells->Tissues->Organ->Organ System->Organism

Question 2

What are the two different types of stem cells?

Answer 2

Embryonic- found in embryos and can become any type of cell

Tissue- found in adults and have a limited number of cell types

Question 3

Meristems?

Answer 3

Non specialised cells which have the potential to become specialised in plants

Question 4

Where are meristems found?

Answer 4

Root and shoot, meristematic tissue

Question 5

Advantages + disadvantages of stem cell research?

Answer 5

Advantage- skin grafts for burn victims, organs can be grown, bone marrow transplants, insulin produced

Disadvantage- not moral or ethically right, killing the embryo

Question 6

Xylem vessels?

Answer 6

Are dead and carry water and minerals up the plant
Supported by rings of lignin
X-WAM xylem- water and minerals

Question 7

Phloem tubes?

Answer 7

Glucose produced in the leaves is carried to all parts of the plant
Phloem are living
Have companion cells regulate the sieves activities
Have sieves to allow the glucose through

Question 8

Stomata?

Answer 8

Pores in the leaf
Allows water to leave the leaf which is called transpiration
Guard cells swell during the night to close the pore
Guard cells lose water to open pore during the day

Question 9

Xylem + Phloem =?

Answer 9

Vascular bundle

Question 10

Red blood cells?

Answer 10

Biconcave disks increasing surface area for oxygen

Carry haemoglobin to bind with oxygen to make oxyhemoglobin, acting as a carrier