THE VARIETY OF LIVING ORGANISMS

Multicellular organisms – Remember it! & Test it!

Multicellular organisms – Remember it! & Test it!

REMEMBER IT!

  • Cells specialise through cell differentiation.
  • Adults contain stem cells which divide and differentiate during cell turnover or to repair damage.
  • Cells aggregate to form tissues.
  • Organs are comprised of one or more type of tissue.
  • Organs that function together are known as a system.

——————————————————

TEST IT!

1.

Cells for repair divide by mitosis.
a. What’s the process called by which they specialise
b. What’s a stem cell? c. One function of stem cells is repair in adults. Name another function.

2.
Give an example for each of the following in animals.
a. A tissue _____________________________________

b. An organ ____________________________________

c. A system ____________________________________

ANSWERS

1.

a. Cell differentiation

b. A stem cell is an unspecialised cell.

c. Repair

2.

a. Answers include:

i. muscle tissue
ii. nervous tissue
iii. connective tissue
iv. epithelia

b. Answers include:

i. heart
ii. brain
iii. liver
iv. kidney

c. Answers include:

i. circulatory
ii. respiratory
iii. immune
iv. skeletal
v. digestive
vi. nervous
vii. reproductive
viii. excretory
ix. integumentary

——————————————————
Some top tips!
1. Print out the Test It! Questions – it will allow you
to replicate exam conditions and also allows you to
give your eyes a rest from the computer screen whilst
doing your crucial revision.
2. Make a copy of the Remember It! Section and put in
a place that you often look at. i.e. front of a journal,
next to a mirror, on a kitchen cupboard door, etc.
That way you can do some cheeky Biology
revision whilst doing those things you have to do!