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Name any two natural gases.
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Organs that can be used for organ transplantation.
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Appendix : vestigial organ : : Peripatus : ____________
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The decaying process of C-14 occurs continuously in dead organisms only.
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Match the following.
| Column A | Column B |
| 1) Morphological evidences | a) Tail-bone or wisdom teeth |
| 2) Paleontological evidences | b) Leaf venation |
| c) Fossils |
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Match the following.
| Column A | Column B |
| 1) Polluting energy | a) smoke particles |
| 2) Environment friendly energy | b) thermal energy |
| c) wind energy |
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Match the following.
| Column A | Column B |
| 1) Sunlight | a) Wind energy |
| 2) Natural gas | b) Environment friendly energy |
| c) Fossil fuel | |
| d) Atomic radiation |
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Energy from fossil fuels and nuclear plants are not eco-friendly sources, why?
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What is green energy?
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Which energy source can be called a green energy source?
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Explain: Fossil energy is not an example of green energy.
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Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
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Give scientific reason.
Vertebrates have slowly originated from invertebrates.
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Give scientific reason.
Duck-billed platypus shows relationship with mammals.
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Give scientific reason.
Concepts of body donation and organ donation have come forward.
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Write a short note:
Embryological evidences
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Complete the flowchart.
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Enlist the evidences of evolution.
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Define the evidence of evolution shown in the figure.
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Draw a neat and labelled diagram.
Jellyfish
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