Living Creatures: Exploring their Characteristics

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NCERT Solutions for Ch 10 Living Creatures: Exploring their Characteristics Class 6 Science

Book Solutions

1

How would you now categorise a seed, as living or non-living?

Answer

Seed is a living thing. Seed can grow into a plant under right conditions.

2

How can the life cycle of a mosquito be disrupted?

Answer

Larvicides (a substance used to kill larvae) target larvae in the breeding habitat before they can mature into adult mosquitoes and disperse. Larvicide treatment of breeding habitats helps reduce the adult mosquito population in nearby areas.
Liquid larvicide products are applied directly to water using backpack sprayers and truck or aircraft-mounted sprayers. Tablet, pellet, granular, and briquet formulations of larvicides are also applied by mosquito controllers to breeding areas.

3

When a seed turns into a sprout, it is said to have germinated. Predict whether the seeds in each pot will germinate. Record your predictions for each pot kept under different conditions in Table.

Answer

Table: Effect of certain conditions on seed germination

4

List the similarities and differences in life cycles of plants and animals.

Answer

Similarities:
• Life cycles of both, plants and animals, begin with an initial stage which is followed by several stages of its growth and development and finally death.
• In life cycle of both, the process of reproduction maintains the continuity of its kind.


Differences:






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5

The table on the next page shows some data. Study the data and try to find out examples appropriate for the conditions given in the second and third columns. If you think that an example /or any of the conditions given below is not possible, explain why.

Answer

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6

You have learnt that different conditions are required for seed germination. How can we use this knowledge for proper storage of grains and pulses?

Answer

To ensure proper storage of grains and pulses and prevent germination:
• Keep Dry
• Cool Storage
• Airtight Containers
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7

You have learnt that a tail is present in a tadpole but it disappears as it grows into a frog. What is the advantage of having a tail in the tadpole stage?

Answer

• The tail in the tadpole stage of a frog provides
• Swimming Ability: It helps the tadpole swim efficiently in water to find food and escape predators.
• Balance and Stability: Assist in maintaining balance while moving in water.
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8

Charan says that a wooden log is non-living as it cannot move. Charu counters it by saying that it is living because it is made of wood obtained from trees. Give your arguments in favour or against the two statements given by Charan and Charu.

Answer

• Against Charan: The wooden log was once part of a living tree, which was alive and exhibited characteristics of living beings.
• Against Charu: Once the wood is separated from the tree, it no longer exhibits growth, reproduction, or other life processes, making it non-living.
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9

What are the similarities and distinguishing features in the life cycles of a mosquito and a frog?

Answer

Similarities
• Both begin life as eggs.
• Both have a larval stage (tadpole in frogs, larvae in mosquitoes) that is aquatic.


Distinguishing Features
Mosquitoes have four stages
Egg → Larva → Pupa → Adult
Respiration: Larvae and pupae breathe through siphons.
Frog has four stages
Egg → Tadpole → Froglet → Adult
Respiration: Tadpoles have gills, adults have lungs and can respire through their skin.

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10

A plant is provided with all the conditions suitable for its growth (Fig. below). Draw what you expect to see in the shoot and the root of the plant after one week. Write down the reasons.

Answer

Expected observations
• Shoot: Growth upwards, towards the light source.
• Root: Growth downwards, into the soil for stability and nutrient absorption.
Reasons
• Shoots grow towards light (phototropism) for photosynthesis.
• Roots grow downwards (gravitropism) for – nutrient absorption.
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11

Tara and Vijay set up the experiment’ shown in the picture (Fig. below). What do you think they want to find out? How will they know if they are correct?

Answer

Tara and Vijay are likely trying to understand how the orientation of a seed affects the growth direction of the shoot (the green ^art above ground) and the root (the part below ground). Observation: If the shoot always grows upwards (towards the light) and the root always grows downwards (into the soil), regardless of how the seed is placed, this shows that plants have natural mechanisms (like phototropism and gravitropism) that guide their growth direction.
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12

Design an experiment to check if temperature has an effect on seed germination.

Answer

AIM: Experiment to Check the Effect of Temperature on Seed Germination
Materials: Identical pots, soil, seeds, thermometers, and different tem¬perature-controlled environments (e.g., refrigerator, room temperature, heated environment).

Procedure
(i) Fill each pot with the same type of soil.
(ii) Plant seeds in each pot.
(iii) Place each pot in a different environment with controlled temperatures (e.g., cold, room temperature, warm). For example, keep one pot outside in balcony to get sunlight. Put another in shade in the room. Keep the third one in basement or at coldest part of the house.
(iv) Water each pot equally.
(v) Record the number of seeds germinated in each environment daily for two weeks.
Observation: Measure and compare the rate of germination and growth in different temperatures.
Conclusion: Determine the optimal temperature for seed germination based on observations.

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