Grade 6 Science Unit 1 Assessment living organisms' questions, the correct answers, and the necessary explanations for each item.

Here’s a structured breakdown of the questions, answers, and explanations for your Grade 6 Science Unit 1 assessment:

### PART I

1. All living organisms can breathe

Answer: Wrong

Explanation: Not all living organisms breathe in the same way. While animals and plants take in gases, some microorganisms do not require oxygen or may utilize different forms of respiration.

2. Autotrophic organisms depend on other organisms to fulfill their food requirements

Answer: Wrong

Explanation: Autotrophic organisms, such as plants, produce their own food through photosynthesis and do not depend on other organisms for their food.

3. Oxygen is a necessary factor for photosynthesis

Answer: Wrong

Explanation: While oxygen is a byproduct of photosynthesis, it is not a necessary factor. The process requires carbon dioxide, sunlight, and water to produce glucose and oxygen.

4. Carbon Dioxide can be identified using lime water

Answer: Correct

Explanation: When carbon dioxide is bubbled through lime water, it turns milky due to the formation of calcium carbonate, indicating the presence of carbon dioxide.

5. Amoeba is a macro organism

Answer: Wrong

Explanation: Amoeba is a microscopic organism, classified as a microorganism, as it is not visible to the naked eye.

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### PART II

1. Write 2 examples for plants

Answer: Examples: Oak tree, Rose bush

2. Write 2 examples for animals?

Answer: Examples: Lion, Elephant

3. Write 5 features of a living organism?

Answer:

- Growth

- Reproduction

- Response to stimuli

- Metabolism (energy use)

- Homeostasis (maintaining stable internal conditions)

4. Write 2 plants that show sleeping movements during the evening?

Answer: Examples: Mimosa pudica (sensitive plant), Prayer plant (Maranta)

5. Write an animal which cannot move?

Answer: Example: Sponge

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6. Write the locomotory organ of the following organisms?

- Cow: Legs

- Earthworm: Setae (bristle-like structures)

- Frog: Legs

- Tuna fish: Fins

- Parrot: Wings

7. Classify the following organisms using a dichotomous key

Organisms: Earthworm, Giraffe, Monkey, Butterfly, Bat

Dichotomous Key Classification:

1. Animal with wings

- a. Insect → Butterfly

- b. Mammal → Bat

2. Animal with four legs

- a. Herbivore → Giraffe

- b. Omnivore → Monkey

3. Animal without legs

- → Earthworm

This format provides a clear understanding of the questions, the correct answers, and the necessary explanations for each item.

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