1. STAAR Review DAY 9 ORGANISMS AND ENVIRONMENTS
TEKS 8.11A (R), 8.11B (R), 7.10B (S), 7.10C (S), 7.11C (S), 8.11D (S)
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2. Food Webs and Energy
In the food web to the left, what role does the Sun play?
Identify the producers, consumers, and decomposers.
How does the ant play a part in the food web?
What would happen to the snake population if the rabbits were over-hunted?
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3. Food Webs and Energy SUN – Source of Energy PRODUCERS – Plants
CONSUMERS – Rabbit, Grasshopper, Snake, Mouse, Eagle
DECOMPOSER – Ant
If the rabbit population decreased, the snake population would as well.
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4. Parasites
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A parasite is an organism that must get its energy from another organism.
Sometimes the relationship is mutually beneficial.
Sometimes one organisms causes the other harm.
Can you think of a parasite that benefits it host?
What about the mosquito in the picture?

5. Ecosystems Look at the ecosystem in the picture to the left.
Suppose a fire disturbed this area 10 years ago. How has ecological succession occurred since then.
How is competition for resources occurring in this ecosystem?
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6. Ecosystem
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In this ocean ecosystem, how are organisms are competing for:
Sunlight
Living space
Food
Oxygen

7. Natural Selection
How does natural selection explain why giraffe’s have long necks?
Why is biodiversity important to natural selection?
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8. Natural Selection
How does natural selection explain why giraffe’s have long necks?
Why is biodiversity important to natural selection?
Natural selection would suggest that only the giraffes with long necks would be able to reach the leaves on the trees.
Biodiversity indicates there are many gene traits among all the giraffes for natural selection to “choose” from.
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12. G F H A N M L K B D C I J E
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