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Posted by Nisha I 1 month, 1 week ago

CBSE > Class 07 > Science

2 answers

Mahinraj Vishwakarma 1 month ago

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Piyush Sagar 1 month, 1 week ago

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Posted by Piyush Joshi 1 month, 1 week ago

CBSE > Class 07 > Science

0 answers

ANSWER

Dorji has a few bottles of soft drinks in his restaurant but are unfortunately these are not labelled he was to serve the drinks on the demand of customers one customer wants to acidic drink and other wants basic and third one wants natural drink how will do the decide which drink is to be served

Posted by Vijay Singh 1 month, 1 week ago

CBSE > Class 07 > Science

2 answers

Mahinraj Vishwakarma 1 month, 1 week ago

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Poojitha Poojitha 1 month, 1 week ago

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ANSWER

How polar animals adapt themselves

Posted by Divya Arya 1 month ago

CBSE > Class 07 > Science

1 answers

Naruto Uzumaki 3 weeks, 5 days ago

Polar animals adapt themselves in polar regions due to these following points- 1.They have thick fur on their body to protect themselves from cold. 2.They have a layer of oily waterproof feathers where fat is stored to regulate body temperature. 3. Animals like penguins have a habit to stay in groups to keep themselves warm. Please answer my question too 🙏!!!! What do u mean by transpiration? How is it relatable to plants?

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Posted by Divya Arya 1 month, 1 week ago

CBSE > Class 07 > Science

0 answers

ANSWER

Which acid is present in our body cell ?

Posted by Adiba Adiba 1 month, 1 week ago

CBSE > Class 07 > Science

5 answers

Naruto Uzumaki 3 days, 21 hours ago

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Adwait Anand 2 weeks, 2 days ago

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Naruto Uzumaki 3 weeks, 3 days ago

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Piyush Joshi 1 month, 1 week ago

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Depanjal Wanjare 1 month, 1 week ago

Deoxyribonucleic acid (DNA)

ANSWER

What are glands Ig-akshita_doesart__

Posted by Akshita Singh 1 month, 1 week ago

CBSE > Class 07 > Science

0 answers

ANSWER

How can you removed the acidity of soil

Posted by Vansh Dumeer Dumeer 1 month, 2 weeks ago

CBSE > Class 07 > Science

2 answers

Shivansh Rawat 1 month, 1 week ago

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Harsh Bhirmaan 1 month, 1 week ago

What is photosynthesis

ANSWER

what are glands explain briefy

Posted by A Vidyul 1 month, 2 weeks ago

CBSE > Class 07 > Science

3 answers

Nisha I 1 month, 1 week ago

Glands are special part in our body that release juice in our body and it help us to digestion of food and digestin of fat

Devang Upadhyay 1 month, 2 weeks ago

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Aashita Rawat 1 month, 2 weeks ago

Glands are special parts in our bodies that make and release juices. These juices help our body do different things, like staying wet (like spit) or telling other parts what to do. Imagine them as little helpers inside us! Btw exam se just pehle padh rahe ho na 😜😜😜

ANSWER

What is sexual reproduction in plant

Posted by Leon Biju 1 month, 2 weeks ago

CBSE > Class 07 > Science

3 answers

Akshita Singh 1 month, 1 week ago

It is a type of reproduction in which two plants one with male and one with female gamete is involved then many processes such as fertilisation and pollination occur

Yashna Pawar 1 month, 2 weeks ago

A type of reproduction in which two parents are involved(male and female gametes) they fuse to form a zygote this process is known as fertilisation

Shreyashi Verma 1 month, 2 weeks ago

A type of reproduction in which two parents are involved in which special cells(male and female gametes) are also involved

ANSWER

Why concave mirror form virtual, erect and magnified image when it is near & real, inverted image when it is at some distance

Posted by Ayush Kumar Mandal 1 month, 3 weeks ago

CBSE > Class 07 > Science

1 answers

Harshit Kharb 1 month, 2 weeks ago

Thus, a concave mirror forms a virtual, erect and magnified image when the object is placed very close to the mirror. Explanation: When the object is between the focus and the pole (Very close to the mirror) of the mirror then a virtual, erect, and magnified image is formed.

ANSWER

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Posted by Lavanya Ayyagari 1 month, 3 weeks ago

CBSE > Class 07 > Science

1 answers

Devesh Sharma 1 month, 3 weeks ago

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Posted by Lavanya Ayyagari 1 month, 3 weeks ago

CBSE > Class 07 > Science

0 answers

ANSWER

What is mein by environment

Posted by Gauri Ahire 1 month, 3 weeks ago

CBSE > Class 07 > Science

3 answers

Adwait Anand 3 weeks, 5 days ago

The surrounding around us that we see is know as environment.

Naitik Desale 1 month, 3 weeks ago

the surrounding around s that we see is environment

Shyam Ladli Vaishnavi 1 month, 3 weeks ago

The surrounding around us that we see is known as environment

ANSWER

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Posted by Srishti Shukla 1 month, 3 weeks ago

CBSE > Class 07 > Science

0 answers

ANSWER

Explain working of an electric bell

Posted by Shilpa Srivastava 1 month, 3 weeks ago

CBSE > Class 07 > Science

3 answers

Naitik Desale 1 month, 3 weeks ago

the electric bell is of electromagnetic. when we on the switch then electric bell will on

Aasmi Abhale 1 month, 3 weeks ago

The electric working because the help of electromagnetic effect

Prince Kumar 1 month, 3 weeks ago

An electric working because the help of electromagnetic effect

ANSWER

What is transcolation ?

Posted by Bhavika None 1 month, 4 weeks ago

CBSE > Class 07 > Science

2 answers

Riya☺ Pal 1 month, 4 weeks ago

It is translocation not transcolation

Riya☺ Pal 1 month, 4 weeks ago

Translocation is the movement of dissolved substances, such as sucrose and amino acids, from parts of the plant where the substances are made to other parts of the plant where they’re needed. Translocation takes place in the phloem - transport vessels made up of two types of cell, sieve tube elements and companion cells. The parts of the plant which make these substances are referred to as sources (e.g. the leaves) and the parts of the plant which store or use the substances are called sinks (examples include bulbs and roots). When sucrose reaches a sink, it is converted into starch for carbohydrate storage. This maintains a concentration gradient between the source and the sink, so that more sucrose moves into the source. Translocation is an active process, so if respiration is reduced or inhibited (e.g. using a respiratory toxin), translocation will be impaired. The Mass Flow Hypothesis The mass flow hypothesis is a theory which attempts to explain how solutes are transported from source cells into sinks through the phloem. It isn’t concrete, but it is the best-accepted theory we currently have based on the available evidence. It states that mass flow of solutes takes place in the phloem in the following stages: Sucrose moves from companion cells into sieve tube elements by active transport. This reduces the water potential of the sieve tube element. Water moves into the phloem by osmosis, which increases the hydrostatic pressure. There is a pressure gradient with high hydrostatic pressure near the source cell and lower hydrostatic pressure near the sink cells. Solutes move down the pressure gradient towards the sink end of the phloem. Solutes move into sink cells and are converted into other molecules (e.g. starch). The removal of solutes increases the water potential at the sink end, causing water to move out of the phloem by osmosis. This maintains the hydrostatic pressure gradient between the source and the sink

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Posted by Tejas Madhuramesh 1 month, 4 weeks ago

CBSE > Class 07 > Science

1 answers

Preetham T Preethu 1 month, 4 weeks ago

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The time measuring devices used in sport can measure time intervals of A. A milli second B. A micro second C. A Nano second D. None of these

Posted by Chahat Bhardwaj 1 month, 4 weeks ago

CBSE > Class 07 > Science

1 answers

Riya☺ Pal 1 month, 4 weeks ago

The correct answer is B) a micro second

ANSWER

What are saprophytes????

Posted by Ishakshi Mishra 2 months ago

CBSE > Class 07 > Science

4 answers

Riya☺ Pal 1 month, 4 weeks ago

Saprotrophic microscopic fungi are sometimes called saprobes. Saprotrophic plants or bacterial flora are called saprophytes (sapro- 'rotten material' + -phyte 'plant'), although it is now believed[citation needed] that all plants previously thought to be saprotrophic are in fact parasites of microscopic fungi or other plants. The process is most often facilitated through the active transport of such materials through endocytosis within the internal mycelium and its constituent hyphae.[3] Mycelial cord made up of a collection of hyphae; an essential part in the process of saprotrophic nutrition, it is used for the intake of organic matter through its cell wall. The network of hyphae is referred to as a mycelium, which is fundamental to fungal nutrition. Various word roots relating to decayed matter (detritus, sapro-), eating and nutrition (-vore, -phage), and plants or life forms (-phyte, -obe) produce various terms, such as detritivore, detritophage, saprotroph, saprophyte, saprophage, and saprobe; their meanings overlap, although technical distinctions (based on physiologic mechanisms) narrow the senses. For example, usage distinctions can be made based on macroscopic swallowing of detritus (as an earthworm does) versus microscopic lysis of detritus (as a mushroom does).

Grishika Shree 1 month, 4 weeks ago

Organism which take nutrition from dead and decaying matter is known as saprophytes

Jai Baba Ki Makahal 1 month, 4 weeks ago

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Master Vivek Chandra Bhatt 2 months ago

The organism which take nutrition from dead and decaying organic matter

ANSWER

Can anyone define convex lens, Concave lens, Concave mirror, convex mirror please 🙏

Posted by M.Hema Harini 2 months ago

CBSE > Class 07 > Science

5 answers

R.Vanthana Shree 1 month, 4 weeks ago

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R.Vanthana Shree 2 months ago

Concave lens : A lens which is thin in the middle and thick at the edges

Ravi Kumar 1 month, 4 weeks ago

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3Thank You

Ravi Kumar 1 month, 4 weeks ago

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Ravi Kumar 1 month, 4 weeks ago

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ANSWER

ventilation is provided near the roof in houses because

Posted by Feiba Ann Philip 2 months ago

CBSE > Class 07 > Science

3 answers

Devshree Tarar 2 months ago

What is rsprition

Feiba Ann Philip 2 months ago

The plants release oxygen through the process of photosynthesis. The plants help to provide oxygen to animals for respiration. They also maintain the balance of oxygen and carbon dioxide in the atmosphere. That is why forest are called as green lungs. (Page no:148)

Mili Sahu Mili Sahu 2 months ago

Why forest are called geen lungs

ANSWER

Why can't we use a plain mirror as a side mirror in a scooter or a car

Posted by Dnyanada Singh 1 month, 4 weeks ago

CBSE > Class 07 > Science

2 answers

Riya☺ Pal 1 month, 1 week ago

Hint: We all use convex mirrors in the side view of our cars, to see the image of any object's broader field of view that makes us comfortable while driving. Whereas a plane mirror will show the image bigger that makes it uncomfortable while driving. Complete answer: A convex mirror is used instead of a plane mirror because it has a large view angle with always an erect image formation irrespective of the position of the object.Convex mirrors are preferred as rear-view mirrors in vehicles because they provide a broader field of view, allowing the driver to see the majority of the traffic behind him. In cars and vehicles, a convex mirror is favoured as a rear-view mirror because it provides a broader field of view, allowing the driver to see the majority of the traffic behind him. Convex mirrors always reflect the objects in front of them in an erect, imaginary, and shrunken form. Convex mirrors always reflect the items in front of them in a virtual, erect, and shrunken picture. -A virtual picture is always formed by a convex mirror and is always situated behind the mirror. -The picture is vertical and located at the focal point when the item is far away from the mirror. -As the object approaches the mirror, the image follows suit and increases until it reaches the same height as the object. -Convex mirrors produce images that are smaller than the item but become larger as they approach the mirror. Therefore, a convex mirror is used instead of a plane mirror in the side view of a car because the image formed by a convex mirror is smaller and closer to that formed by a plane mirror. Hence, the correct options are (B) and (C). Note: As long as the object is in their focus, concave mirrors in vehicles help to reduce blind spots. The reflecting surface of a concave mirror, on the other hand, bends inwards and away from the light source.

1234 Abcd 2 months ago

Because the mirror in a scooter / car show the image very close . So, we don't use plain mirror as it doesn't help us to see the image very close

ANSWER

Explain why there is need of variety of animals and plants in the forest?

Posted by Preetha R 2 months, 1 week ago

CBSE > Class 07 > Science

1 answers

Swastik Tiwari 2 months, 1 week ago

In a forest, there is a need for a variety of animals and plants because they all play important roles in maintaining the ecosystem. Animals help with pollination, seed dispersal, and controlling populations of other organisms. Plants provide food and shelter for animals, while also helping to regulate the climate and produce oxygen. It's like a big, interconnected web where each species has its own vital role to play!

ANSWER

Shat we can get from plants some examples

Posted by Mattam Ravikanth 2 months, 1 week ago

CBSE > Class 07 > Science

1 answers

Naga Seershika 2 months, 1 week ago

We get from plants are: fruits, vegetables, flowers, cotton, paper, ceral grains, and medicine etc...

ANSWER

Why the colour of leaves are green

Posted by Anurag Singh 2 months, 1 week ago

CBSE > Class 07 > Science

5 answers

Nisha I 1 month, 1 week ago

Leaves appear a green pigment called chlorophyll which absorb sunlight

Mriganka Das 1 month, 4 weeks ago

Because of chlorophyll

Dnyanada Singh 2 months ago

There is a green pigment called chlorophyll, which makes the leaf green

Swastik Tiwari 2 months, 1 week ago

Leaves appear green because they contain a pigment called chlorophyll, which absorbs sunlight for photosynthesis.

Mattam Ravikanth 2 months, 1 week ago

Because of photosynthesis

ANSWER

Write a short note on excretion in plants

Posted by Purvika Jadhav 2 months, 1 week ago

CBSE > Class 07 > Science

2 answers

Swastik Tiwari 2 months, 1 week ago

Excretion in plants is an interesting topic. While plants don't have kidneys like humans do, they still have their own way of getting rid of waste. One of the main ways plants excrete waste is through tiny openings called stomata on their leaves. These stomata allow plants to release excess water and gases, like oxygen and carbon dioxide. Plants also excrete waste products through their roots. They release substances like organic acids and ions into the soil, which can affect the pH and nutrient levels around them. This process helps the plants maintain a healthy internal environment. So, even though plants don't excrete waste in the same way as animals do, they have their own unique methods to keep themselves clean and balanced. Nature is pretty amazing, right? Let me know if you have any more questions!