⚡ Rapid Revision: Short Notes (Part 1)
🏠 Habitat
The natural home or surroundings of an organism (Terrestrial or Aquatic).
🦎 Adaptation
Specific features that help an organism survive in its habitat.
☀️ Abiotic
Non-living components like sunlight, air, water, and soil.
🐾 Biotic
Living components like plants, animals, and microorganisms.
Terrestrial Adaptation Quick-Check
- 🌵 Desert Plants: Leaves → Spines; Photosynthesis → Green fleshy stems; Roots → Deep.
- 🐪 Desert Animals: Hump (Fat storage); Long legs (Heat protection); No sweat (Water conservation).
- 🏔️ Mountain Plants: Conical shape (Snow slides off); Needle-like leaves.
- 🐆 Mountain Animals: Thick fur/skin; Strong hooves; High RBC count.
- 🦁 Grasslands: Camouflage (Lion's brown coat); Side eyes (Deer's wide vision).
Survival Strategies:
Hibernation: Winter Sleep (Cold)
Aestivation: Summer Sleep (Heat)
Predator vs Prey
| Type | Key Feature | Reason |
|---|---|---|
| Predator | Eyes in front | To focus on the target. |
| Prey | Eyes on side | To look in all directions. |
⚡ Rapid Revision: Short Notes (Part 2)
The Water & Air "Cheat Sheet"
| Organism | Key "Must-Know" Adaptation |
| Fish | Gills (Breathing) + Streamlined body (Speed). |
| Whales/Dolphins | Blowholes (Lungs) + Blubber (Insulation). |
| Frogs | Webbed feet (Swim) + Moist skin (Breathe). |
| Birds | Hollow bones (Lightweight) + Wings (Forelimbs). |
| Aquatic Plants | Hollow stems + Ribbon-like leaves (Submerged). |
Seed Dispersal: "How Seeds Move"
- 🌬️ By Wind: Light, wings, or hair (Ex: Cotton, Drumstick).
- 💧 By Water: Spongy/Fibrous coats to float (Ex: Coconut, Lotus).
- 🐕 By Animals: Hooks, spines, or sticky (Ex: Xanthium, Tiger nail).
- 💥 By Explosion: Pods burst when dry (Ex: Pea, Balsam).
⚠️ Common Exam "Trap" Questions
* True or False: All aquatic animals have gills? (False!) Whales/Dolphins have lungs.
* Why do cactus have spines? To reduce water loss by transpiration.
* Why hollow stems? To help aquatic plants float and reach the surface for light.
Reasoning Point: Competition
Seed dispersal is vital to prevent competition for space, water, and sunlight. Without it, the parent plant and its seedlings would starve each other.
End of Revision Notes: Habitats and Adaptations