This document provides a study guide for a Grade 9 Biology revision. It includes instructions for think-pair-share activities to discuss cell organelle and molecule matching questions. It also covers ecological pyramids, the nitrogen cycle, water cycle, and potential impacts to ecosystems if certain events occurred.

1. Grade 9 Bio Revision
November 2013

2. Think - Pair - Share
1. Find one partner.
2. Read each slide.
3. Discuss possible answers.
4. Choose your final answer.
5. Share with the class.

3. Cell Organelles: Matchup
1. Golgi complex
A. organizes chromosomes
2. Nucleus
B. builds proteins
3. Ribosome
C. manufactures membranes
4. Rough ER
D. transports molecules
5. Centriole
within the cell
E. directs cell function

4. Cell Organelles: Matchup
6. Chromosome F. stores water, waste, &
7. Plasmadesma
nutrients
8. Smooth ER
G. duplicated genetic material
9. Cell Wall
H. makes enzymes & lipids
10. Vacuole
I. supports the cell
J. bridge between cells

5. Compare Plant + Animal Cells
List all the ways they are ALIKE.

6. Contrast Plant + Animal Cells
List all the ways they are DIFFERENT.

7. Molecules: Matchup
11. proteins
K. phosphate, sugar & base
12. lipids
L. fats
13. water
14. RNA
15. nucleic acid
M. serve as enzymes &
antibodies
N. universal solvent
O. messenger molecule

8. Molecules: Matchup
16. CO2
P. short-term energy
17. phospholipid Q. instruction manual
18. carbohydrate R. respiration waste product
19. DNA
S. membrane component
20. amino acid
T. protein part

9. Ecological Pyramids
A. 2 individuals
1. producer
B. 2,000,000
2. primary consumer
individuals
3. secondary consumer
C. 2,000 individuals
4. tertiary consumer
D. 200 individuals
5. quaternary consumer
E. 20,000 individuals

10. Ecological Pyramids
F. 2 individuals
6. apex predator
G. 2,000,000
7. herbivore
individuals
8. carnivore
H. 2,000 individuals
9. omnivore
I. 200 individuals
10. autotroph
J. 20,000 individuals

11. Nitrogen Cycle in Order
_____ N2 in the atmosphere
_____ amino acids and proteins
_____ ammonium (NH4+)
_____ root nodules in legumes
_____ nitrates (NO3-)
_____ denitrification
_____ assimilation

12. Water Cycle in Order
_____ condensation
_____ infiltration into soil
_____ evaporation
_____ percolation through bedrock
_____ aquifers
_____ precipitation

13. What would happen if…?
1. Half the Thompson gazelles died in
Mikumi NP?
2. A fungus killed most of the grass in Ruaha
NP?
3. There were exceptionally good rains for 3
years in Serengeti NP?