differentiation and specialisation

Question 1

how long can animal cells differentiate for?

Answer 1

it is lost at an early stage once specialised

Question 2

how long can plant cells differentiate for?

Answer 2

never loose the ability to

Question 3

what do the few cells that can differentiate in mature animal cells do

Answer 3

repair skin and blood cells mainly

Question 4

what are undifferentiated cells called?

Answer 4

stem cells

Question 5

how are sperm cells specialised

Answer 5

stream line head to swim to egg
long flagella/tail to propel to egg

Question 6

how are nerve cells specialised

Answer 6

long- cover more distance
branched connections- to form a network around the body

Question 7

how are muscle cells specialised

Answer 7

long- space to contract
lots of mitochondria-to generate lots of energy needed to contract

Question 8

how are root hair specialised

Answer 8

big surface area- to absorb as many minerals and ions ad possible

Question 9

what do phloem tubes do?

Answer 9

-made of elongated living cells with pores to allow cell sap through
-transport food(mainly dissolved sugars)
-transport in both directions
-process in called translocation

Question 10

what do xylem tubes do?

Answer 10

-made of dead cells
-strengthened by lignin
-carry water and mineral ions from roots to stem and leaves
transpiration stream