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3. What is the difference between a null and alternative hypothesis?
• A procedure used to solve problems or answer questions.• A way of thinking and looking at the world.• A technique used to gather information and reach conclusions.
Observation Hypothesis Experiment Conclusion
If the results do not support hypothesis
Then revise the hypothesis
Reference: Dr. Hughey’s Bio30 class slide
Null hypothesis - a concept which arises in the context of statistical hypothesis testing. The null hypothesis set out for a particular significance test always occurs in conjunction with an alternative hypothesis. Alternative hypothesis - the possibility that an observed effect is genuine and the null hypothesis is the rival possibility that it has resulted from chance. --From Wikipedia
4. Based on what you see in front of you, write a hypothesis. How would you test your hypothesis? In your test, what are your independent and dependent variables, and your controls?
Plants grow faster when illuminated with 500 nm light than with 660 nm light.
30 lights with different wave length
Wave length of each light
The length of plants at limited time(e.g. 1 month)
Same temperature, same species, same pot, same amount of water, same soil…
5. You go to field trip to hunt mushroom for Bio3 Botany class at Rip Van Winkle Open Space Park Pacific Grove,CA. You find a beautiful fungus. How do you identify the fungus? List at least 4 ways.
____________________________________
_________________________________________
_________________________________________
_________________________________________
1) Ask Botanist
2) Find botany book and compare the picture
3) Use dichotomous key
4) DNA analysis
A DB C
E
6. In the a dichotomous key, Fill in the blank.
2. Outline of leaf oval-shaped ...........____2. Outline of blade star-shaped .........____
23. What is the common name of the photosynthetic organism in front of you?
How many of organisms are there in each specimen? What are they? What type of relationship are there (e.g parasitic, symbiosis, friendship, enemies,….etc)?
What types of growth form are in A, B, & C? A:_____________ B:_____________ C:_____________ D:_____________
A B
C
Lichen
Two; Algae + fungi (Ascomycota, Basidiomycota)
Symbiosis (mutualism)
FruticoseCrustoseFruticoseFoliose
D
24. You are looking at lichen. What is the name of layer in the black or purple dot?
26. The left sides are come from roots of a plant. What is the relationship presented? Explain in detail (e.g. things that they give and take each other.)Give the name in each slide.
A:_________________
B:_________________
What is the difference between A and B?
A
B
Ectomycorrhiza
Endomycorrhiza
A - Fungal hyphae penetrate the plant cell wall in root.B – Fungi wrap outside root.
The plant provides fungi with nutrient(carbohydrates).The fungi help the plant to obtain nitrogen and protect the plant from pathogen.