Adaptations: feature, effect and environmental advantage
| English | 中文 | Pinyin |
|---|---|---|
| adaptation/ˌædæpˈteɪʃn/ | 适应性特征 | shì yìng xìng tè zhēng |
| extremophile/ekˈstreməfaɪl/ | 嗜极生物 | shì jí shēng wù |
What would explain this observation?
- A thick fur coat has a different value in a cold habitat and a hot one. An adaptation 适应性特征 explanation needs the environmental condition as well as the feature.
- Start with a prediction. State the quantities or features you would compare, then decide what evidence could distinguish two explanations.
Build the model
- Adaptations are features that help organisms survive in conditions where they normally live. Structural adaptations concern body features, behavioural adaptations concern actions and functional adaptations concern biological processes. A supplied desert-plant example might have a reduced leaf surface limiting water loss; the explanation must connect that feature to scarce water.
- adaptation: A feature helping survival in the organism’s normal environment; extremophile 嗜极生物: An organism living in conditions extreme for many organisms.
Which explanation connects a structural feature with its benefit?
Some organisms live in extreme temperature, pressure or salt concentrations and are called extremophiles. The specification includes bacteria living near deep-sea vents. Extreme is relative to the usual conditions for many organisms, not a statement that no life can function there. Adaptations do not guarantee survival under every change.
Match each technical term to its precise meaning.
Use the definitions to distinguish related quantities and processes.
Choose evidence that can test it
- Some organisms live in extreme temperature, pressure or salt concentrations and are called extremophiles. The specification includes bacteria living near deep-sea vents. Extreme is relative to the usual conditions for many organisms, not a statement that no life can function there. Adaptations do not guarantee survival under every change.
- For an unfamiliar organism, read the supplied feature and habitat and write feature → effect → advantage. Classify the adaptation using the evidence, allowing that one description can include more than one kind. Use pictures or prepared material; do not expose animals or people to stressful environments.
Which two habits make the investigation or model in this case more defensible?
For an unfamiliar organism, read the supplied feature and habitat and write feature → effect → advantage. Classify the adaptation using the evidence, allowing that one description can include more than one kind. Use pictures or prepared material; do not expose animals or people to stressful environments.
Work from known quantities
- State the known values and their units. Choose the relation because its assumptions fit this case, then rearrange before substitution.
- Known: two fictional leaf models lose 12 and 8 water units over the same interval. Reduction in the second model is (12−8)/12×100 = 33.3% to one decimal place. A controlled model helps test an effect, but a real plant also depends on roots, stomata and environmental conditions.
Model water loss falls from 20 to 15 units. Calculate percentage reduction. Use the same sequence: known quantities → model → relation → substitution → unit and interpretation.
Model water loss falls from 20 to 15 units. Calculate percentage reduction.
The result is 25 %. Known: two fictional leaf models lose 12 and 8 water units over the same interval. Reduction in the second model is (12−8)/12×100 = 33.3% to one decimal place. A controlled model helps test an effect, but a real plant also depends on roots, stomata and environmental conditions.
Check the conclusion and its limits
- Saying an organism is adapted because it lives there repeats the observation without explaining it. Functional means a biological process, not simply that a shape is useful. An extremophile is not necessarily an organism from every extreme environment.
- Return to the original observation. Explain what the result supports, which conditions it assumes, and one way to test a competing explanation.
An adaptation guarantees survival in every possible environment. This claim is false: Saying an organism is adapted because it lives there repeats the observation without explaining it. Functional means a biological process, not simply that a shape is useful. An extremophile is not necessarily an organism from every extreme environment.
Adaptations: feature, effect and environmental advantage: Some organisms live in extreme temperature, pressure or salt concentrations and are called extremophiles. The specification includes bacteria living near deep-sea vents. Extreme is relative to the usual conditions for many organisms, not a statement that no life can function there. Adaptations do not guarantee survival under every change.
An adaptation guarantees survival in every possible environment.
Saying an organism is adapted because it lives there repeats the observation without explaining it. Functional means a biological process, not simply that a shape is useful. An extremophile is not necessarily an organism from every extreme environment.
A feature helping survival in the organism’s normal environment: write the technical term.
adaptation means A feature helping survival in the organism’s normal environment.