Reproduction in Plants-B

📘 Welcome

Hi User, you have selected Read Mode.
This is Time Free Mode for your convenience to understand every question as per your Ease and Time.

Here You get Answer and Details button. After mastering this mode, you can go for a test with Test Mode on the main page designed especially with Exam Features.

🔊 Voice Sound ON

Q1. What is the process of seeds moving away from the parent plant called?

A Germination

B Seed dispersal

C Reproduction

D Pollination

Seed dispersal is the process by which seeds are carried or transported from the parent plant to new places, helping them grow in different areas.

Q2. Why is seed dispersal important for plants?

A To keep all plants together

B To reduce competition for water and sunlight

C To make the parent plant weaker

D To stop new plants from growing

If all seeds fell near the parent plant, they would compete for water, sunlight, and space. Dispersal helps seeds find new places to grow, reducing this competition.

Q3. Which seeds are most likely to be dispersed by wind?

A Heavy seeds like mango

B Light seeds with wings or hair

C Seeds that float in water

D Seeds that are eaten by animals

Wind can easily carry light seeds that have special structures like wings (maple) or hair (dandelion) to help them float through the air.

Q4. Which of these is an example of a seed dispersed by wind?

A Coconut

B Mango

C Maple

D Apple

The maple seed has wing-like structures that help it spin and fly through the air, allowing the wind to carry it far from the parent tree.

Q5. How are coconut seeds mainly dispersed?

A By wind

B By animals

C By water

D By birds

Coconut seeds have a fibrous, spongy outer covering that allows them to float on water. They can travel across oceans and grow on new shores.

Q6. Why do some seeds have hooks or spines on them?

A To look beautiful

B To attach to animal fur

C To float on water

D To fly in the wind

Seeds like grass or burrs have tiny hooks or spines that easily stick to the fur of passing animals. The animals carry them to new places where they fall off and grow.

Q7. Which of the following is dispersed by birds?

A Seeds that are very heavy

B Seeds that are tasty and colorful like berries

C Seeds with wings

D Seeds that float on water

Birds are attracted to bright, fleshy fruits like berries. They eat the fruit, and the seeds pass through their digestive system and are dropped far away in their droppings.

Q8. What happens when animals eat fruits with seeds?

A The seeds are destroyed completely

B The seeds are dispersed through animal droppings

C The seeds start germinating inside the animal

D The seeds become heavier

Many animals eat fruits, and the seeds inside are not digested. They pass through the animal’s body and are released in droppings at different locations, helping the seeds spread.

Q9. Which of these seeds is dispersed by water?

A Dandelion

B Lotus

C Xanthium

D Pea

Lotus seeds are found in water and have air spaces that make them buoyant. They float on water and are carried to different places where they can grow.

Q10. How does the dandelion seed travel?

A By sticking to animal fur

B By floating in water

C By blowing away with the wind

D By being buried in the soil

The dandelion seed has a beautiful, feathery structure (like a parachute) that allows it to be caught by the wind and carried far away from the parent plant.

Q11. What is the main reason farmers prepare the soil before sowing seeds?

A To make it look beautiful

B To make it soft and allow roots to grow easily

C To remove all the water from it

D To make the soil hard

Preparing the soil (ploughing) makes it loose and airy. This allows the roots of the new plants to penetrate easily and absorb water and nutrients.

Q12. What is sowing?

A Harvesting the crop

B Protecting the crop

C Planting seeds in the soil

D Watering the plants

Sowing is the process of putting seeds into the soil so that they can germinate and grow into new plants. It is the first step in growing a crop.

Q13. Which of the following is a necessary requirement for a good crop?

A Only sunlight

B Good quality seeds

C Only water

D Only fertile soil

For a good crop, it is essential to use healthy, good quality seeds. These seeds are more likely to germinate well and produce strong, healthy plants.

Q14. Why do farmers need to add manure or fertilizer to the soil?

A To make the soil look dark

B To add nutrients to the soil for plant growth

C To make the soil dry

D To kill insects

Plants need nutrients from the soil to grow well. Manure and fertilizers replenish these nutrients, making the soil fertile and helping the crop grow healthy.

Q15. What is the process of providing water to crops called?

A Irrigation

B Germination

C Sowing

D Harvesting

Irrigation is the method of supplying water to crops at regular intervals. It is essential for plant growth, especially when there is not enough rainfall.

Q16. Why is sunlight necessary for a good crop?

A To make the soil fertile

B To help plants make their own food through photosynthesis

C To water the plants

D To keep the plants warm at night

Sunlight is the energy source for plants to make their own food (photosynthesis). Without adequate sunlight, plants cannot grow properly and will not produce a good crop.

Q17. What are pesticides?

A Substances that help seeds germinate faster

B Substances that kill or repel pests (harmful insects)

C Substances that add nutrients to the soil

D Substances that provide water to plants

Pesticides are chemicals used by farmers to protect their crops from harmful insects and pests that can destroy the plants and reduce the yield.

Q18. What are insecticides?

A Chemicals that kill weeds

B Chemicals that kill insects

C Chemicals that help plants grow

D Chemicals that are used for irrigation

Insecticides are a type of pesticide specifically designed to kill insects that damage crops, like locusts, caterpillars, and beetles.

Q19. Why do farmers need to protect their crops from weeds?

A Weeds make the soil fertile

B Weeds compete with crops for water, nutrients, and sunlight

C Weeds help crops grow faster

D Weeds provide shade to crops

Weeds are unwanted plants that grow along with the crop. They steal water, nutrients, and sunlight from the crop plants, reducing their growth and yield.

Q20. Which of the following is a natural way to protect crops from pests?

A Using chemical pesticides

B Using insecticides

C Using neem leaves or other natural repellents

D Using fertilizers

Natural methods like using neem leaves, garlic spray, or introducing friendly insects are organic ways to keep pests away without using harmful chemicals.

Q21. What is the process of cutting and gathering the mature crop called?

A Sowing

B Irrigation

C Harvesting

D Germination

Harvesting is the process of cutting and collecting the mature crop from the fields once it is fully grown and ready for use.

Q22. How do birds help in seed dispersal?

A By carrying seeds in their beaks and dropping them

B By eating fruits and dropping seeds far away

C By burying seeds in the ground

D By blowing seeds with their wings

Birds eat fleshy fruits. The seeds pass through their gut and are deposited far away in their droppings, which is a very effective way of seed dispersal.

Q23. What is a ‘weed’ in a farm?

A A useful plant that helps the crop

B A harmful or unwanted plant growing among crops

C A type of fertilizer

D A type of pesticide

Weeds are plants that grow where they are not wanted, like in a crop field. They are harmful because they compete with the main crop for resources.

Q24. Why is it important to use the right amount of water for crops?

A Too much water can make the soil too wet and harm the roots

B Too little water can dry up the plants

C Both A and B

D Water is not important for crops

Giving the right amount of water is crucial. Too little water will dry out the plants, and too much water can waterlog the soil and rot the roots.

Q25. Which of these seeds is most likely to be dispersed by animals?

A Grass seed with hooks

B Seed with a parachute

C Seed that floats

D Very small dust-like seed

Grass seeds often have tiny hooks or barbs that easily catch onto the fur of passing animals, helping the seeds travel to new places.

Q26. What is the purpose of using manure or compost in farming?

A To kill harmful insects

B To add natural nutrients to the soil

C To remove water from the soil

D To make the seeds heavier

Manure and compost are natural fertilizers. They enrich the soil with essential nutrients needed for healthy plant growth, making the crop better.

Q27. How do farmers prevent damage to crops from animals like rats and wild boars?

A By using fences and traps

B By using fertilizers

C By sowing more seeds

D By providing more water

Farmers use physical barriers like fences or set up traps to protect their crops from large animals that might eat or trample the plants.

Q28. A seed of the Xanthium plant has spines. How is it dispersed?

A By wind

B By water

C By sticking to animal fur

D By bursting out of the fruit

The Xanthium seed, also known as a cocklebur, has sharp spines. These spines help it easily attach to the fur of passing animals, which then carry it away.

Q29. What are the main requirements for a good crop?

A Good soil, water, sunlight, and protection from pests

B Only fertilizers and water

C Only sunlight and good seeds

D Only protection from animals

For a good crop, plants need fertile soil with nutrients, enough water and sunlight, and protection from pests, weeds, and diseases. All these factors work together for healthy growth.

Q30. Why should we be careful when using chemical pesticides?

A They are very expensive

B They can be harmful to humans and animals if not used properly

C They make the crops taste better

D They help seeds germinate faster

Chemical pesticides are strong poisons. While they kill pests, they can also be dangerous for humans, animals, and the environment if not used carefully and in the right amounts.