Diversity in the Living World

Given: Two types of seeds — Wheat and Kidney beans.

Concept used: The type of seed (monocot/dicot) determines the type of root system and leaf venation.

Analysis:

Wheat is a monocot seed (single cotyledon).
- Root type: Fibrous roots — a bunch of similar-sized thin roots arising from the base of the stem.
- Leaf venation: Parallel venation — veins run parallel to each other.

Kidney beans is a dicot seed (two cotyledons).
- Root type: Taproot system — one main root (taproot) with small side roots arising from it.
- Leaf venation: Reticulate venation — a net-like pattern of veins on both sides of a thick middle vein.

Summary Table:

| Feature | Wheat | Kidney Beans |
|---|---|---|
| Type of seed | Monocot | Dicot |
| Type of root | Fibrous | Taproot |
| Leaf venation | Parallel | Reticulate |

Conclusion: Wheat (monocot) has fibrous roots and parallel venation, whereas Kidney beans (dicot) has taproot system and reticulate venation.

Given: Animals — Horse, Dolphin, Frog, Sheep, Crocodile, Squirrel, Whale, Earthworm, Pigeon, Tortoise.

Concept used: Animals are grouped as aquatic (live in water), terrestrial (live on land), or amphibious (live in both water and land) based on their habitat.

Grouping:

A — Aquatic animals (live primarily in water):
- Dolphin
- Whale

B — Terrestrial animals (live primarily on land):
- Horse
- Sheep
- Squirrel
- Earthworm
- Pigeon

C — Animals living in both habitats (water and land):
- Frog
- Crocodile
- Tortoise

Note: Frog, Crocodile, and Tortoise can live both in water and on land, so they are placed in section C.

Given: Radish is a root of a plant found in a kitchen garden.

Observation of Radish root:
When we examine a radish, we can see that it has one main thick root (the edible part) with small side roots arising from it. This is characteristic of a taproot system. Therefore, radish is a taproot (a modified taproot that stores food).

Type of venation in radish leaves:
Since radish has a taproot system, it is a dicot plant. Dicot plants generally have reticulate venation in their leaves — a net-like pattern of veins on both sides of a thick middle vein.

Conclusion: Radish has a taproot (modified/fleshy taproot), and its leaves show reticulate venation.

Given: Two images — (a) Mountain Goat and (b) Goat found in the plains.

*(Note: The images are referenced in the source but cannot be viewed. The answer is based on known features of these animals.)*

Similarities:
- Both are goats and belong to the same group of animals.
- Both have four legs and hooves.
- Both are herbivores (plant-eating animals).
- Both have horns.
- Both have a tail.

Differences:

| Feature | Mountain Goat | Goat in the Plains |
|---|---|---|
| Body hair/fur | Thick, dense fur to keep warm | Thin, short coat of hair |
| Hooves | Wide, hard hooves with rough pads for gripping rocky surfaces | Narrower hooves suited for flat ground |
| Body build | Stocky and muscular for climbing | Lighter build |
| Colour | Often white or light-coloured (camouflage in snow) | Varied colours |

Reasons for differences (Adaptations):
The differences are due to adaptations — special features that help an organism survive in its particular habitat.
- The mountain goat lives in cold, rocky, and steep mountain regions. It has thick fur to protect against cold temperatures and wide, rough hooves to grip rocky surfaces and climb steep slopes.
- The goat in the plains lives in a warmer, flat environment. It does not need thick fur or specially adapted hooves, so it has thin hair and regular hooves suited for flat terrain.

Conclusion: The differences between the two goats are due to adaptations to their respective habitats — mountains and plains.

Given: Animals — cow, cockroach, pigeon, bat, tortoise, whale, fish, grasshopper, lizard.

Feature chosen for grouping: Presence or absence of a backbone (vertebrates vs. invertebrates)

Group 1 — Animals with a backbone (Vertebrates):
- Cow
- Pigeon
- Bat
- Tortoise
- Whale
- Fish
- Lizard

Group 2 — Animals without a backbone (Invertebrates):
- Cockroach
- Grasshopper

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*(Alternative grouping — Animals that can fly vs. animals that cannot fly)*

Group 1 — Animals that can fly:
- Pigeon
- Bat
- Cockroach
- Grasshopper

Group 2 — Animals that cannot fly:
- Cow
- Tortoise
- Whale
- Fish
- Lizard

Note: Students may choose any valid feature not discussed in the chapter (e.g., presence of wings, number of legs, body covering, etc.) as the basis for grouping.