1. MCAS Life Science Review

2. Cells
Animal
Plant

3. Cells: Similarities Plant Animal Cell Membrane Cytoplasm Nucleus
Mitochondria
Organelles: Small ,membrane enclosed, parts of the cell that do a specific job.

4. Cells: Differences Plant Animal Cell Wall Vacuole Chloroplasts
Organelles: Small ,membrane enclosed, parts of the cell that do a specific job.

5. Cells
Questions: 1. What type of cells are these? 2. How can you tell? 3. What is the importance of the green organelles?

6. Types of Cells There are many different types of cells.
Different cells can look very different.
Their shape and size help them do their specific job.
Red Blood Cells
Neurons: Brain Cells
Cardiac Muscle Cells

7. Body Organization

8. Human Body Systems

9. DNA, Genes, and Heredity

10. DNA, Genes, and Heredity

11. Can you tell if this DNA came from a boy or a Girl?
DNA, Genes, and Heredity
This is a Karyotype.
It shows the 23 PAIRS of chromosomes in one human skin cell. These chromosomes contain DNA. 23 individual chromosomes came from the mother and23 of them came from the father.
Can you tell if this DNA came from a boy or a Girl?
It’s a BOY!
XY is a boy and XX is a girl

12. Punnett Square for Gender

13. Punnett Squares

14. Genotype and Phenotype
Genotype: the genes passed down from the parents Phenotype: the trait that you can see

15. Punnett Squares
What percentage of the offspring will have yellow Seeds?
Green Seeds?

17. Sexual vs. Asexual Reproduction
2 Parents
Offspring are NOT identical to the parents
More genetic diversity
Asexual Reproduction:
1 Parents
Offspring are identical to the parent

18. Sexual vs. Asexual Reproduction
Question:
Which type of reproduction will lead to greater genetic diversity in a population?

19. Food Chain All organisms in an ecosystem
Arrows go in the direction of Energy flow
Producers (Plants) convert solar energy into food for all other organisms to use

20. Food Chain: Trophic Levels
Feeder Level
Plants PRODUCE their own food
Primary (First) Consumers Eat ONLY Plants - Herbivores
Secondary Consumers Eat Primary Consumers
Tertiary Consumers Eat Secondary Consumers
Top Predators - Carnivores

21. Food Web http://www.youtube.com/watch?v=EdKhQVHc3Ao
The interactions of all organisms in an ecosystem
Arrows go in the direction of Energy flow
Producers (Plants) convert solar energy into food for all other organisms to use

22. Symbiosis Relationships between Organisms
Mutualism
Parasitism
Commensalism
Predator -Prey

23. Evolution By Natural Selection
Natural selection is simply the logical result of four features of living systems:
variation - individuals in a population vary from one another
inheritance - parents pass on their traits to their offspring genetically
selection - some variants reproduce more than others
time - successful variations accumulate over many generations

24. Darwin’s Evidence for Evolution

25. Evolution of Bacteria

28. Classification

29. Classification