CBSE > Class 07 > Science | CBSE Board | Homework Help

Protozoa is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris.

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Prachi M. Parmar 2 years, 9 months ago

Protozoa are single celled organisms. They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium with its fixed shape and complex structure. They live in a wide variety of moist habitats including fresh water, marine environments and the soil.

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How do plants respire? draw the diagram

Posted by M Vashitha 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Aayana Lapse 2 years, 9 months ago

Plants exchange gasses like human beings to gain energy for their growth through stems, roots and leaves.

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What is menstruation explain

Posted by Sri Vignesh Sirangi 2 years, 9 months ago

CBSE > Class 07 > Science

2 answers

Aditi Kumari 7A 2 years, 8 months ago

Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle

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Prachi M. Parmar 2 years, 9 months ago

Menstruation, or period, is normal vaginal bleeding that occurs as part of a woman's monthly cycle. Every month, your body prepares for pregnancy. If no pregnancy occurs, the uterus, or womb, sheds its lining. The menstrual blood is partly blood and partly tissue from inside the uterus.

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what is sexual reporduction

Posted by Aditya Dubey 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Abhishek Sahoo 2 years, 9 months ago

Yes

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Why do you want houses with ventileter

Posted by Himanshi Jain 2 years, 9 months ago

CBSE > Class 07 > Science

3 answers

Ankita Budhwar 2 years, 8 months ago

So that cold air can come in

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Prem Kumar 2 years, 9 months ago

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A. Vasundhara 2 years, 9 months ago

To avoid fertidatered heat

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Explain why holes are made in hanging banners and hoardings.

Posted by Pushpa Pushpa 2 years, 9 months ago

CBSE > Class 07 > Science

2 answers

Ankita Budhwar 2 years, 8 months ago

So that wind can pass through them and due to air pressure they won't tear

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Prachi M. Parmar 2 years, 9 months ago

Air exerts pressure in all directions. Due to this pressure, the banners and hoardings may tear or fall down. Holes will let the wind pass and they do not become loose and fall down. Hence, holes are made in hanging banners and hoardings.

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ANY FF PLAYER PLEASE GIVE UID

Posted by Op Xd 2 years, 9 months ago

CBSE > Class 07 > Science

4 answers

Patitpaban Nahak 2 years, 9 months ago

Op xD is doing crime by talking about ff in study app

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Patitpaban Nahak 2 years, 9 months ago

Op xD is a criminal i will FIR him pls contact? to police? and arrest ? him.... I am giving advice to arrest him

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Dhony Fredrick J 2 years, 9 months ago

This is studying app so plz no ff

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Ashab Patel 2 years, 9 months ago

796444118

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Which of the following is not a source of waste water? (a) Sewers (b) Homes (c) Industries (d) Hospitals

Posted by Bhoomika Singh 2 years, 9 months ago

CBSE > Class 07 > Science

5 answers

Saksham Shrivastava 2 years, 9 months ago

Sewers

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Vanshika Pandey 2 years, 9 months ago

Option a is correct answer Sewers

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Neel Vala 2 years, 9 months ago

Sewer

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Ashab Patel 2 years, 9 months ago

Sewers

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Sattwik Meher 2 years, 9 months ago

Sewers

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What is the full form of NASA

Posted by Kabhilan Kabhilan 2 years, 9 months ago

CBSE > Class 07 > Science

2 answers

Sravan Kumar 2 years, 9 months ago

National Aeronautics and Space Administration

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Sneha Raghuwanshi ? 2 years, 9 months ago

National Aeronautics and Space Administration

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ANSWER

How does a sewer system function

Posted by Lodaya Khushi 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Prachi M. Parmar 2 years, 9 months ago

A sewerage system, or wastewater collection system, is a network of pipes, pumping stations, and appurtenances that convey sewage from its points of origin to a point of treatment and disposal.

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QUICK LIME IS ADDED TO SOIL GIVE REASON

Posted by Vivan Peswani 2 years, 9 months ago

CBSE > Class 07 > Science

2 answers

Patitpaban Nahak 2 years, 9 months ago

This is because when we test the soil if we get a color between red to lime yellow it means it's too acidic quick lime helps to lower the acid in the soil

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Vidhi Assudani 2 years, 9 months ago

This is because when we test the soil if we get a color between red to lime yellow it means it's too acidic quick lime helps to lower the acid in the soil .

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YEAST IS USED IN (a) wine and beer industry (b) bakery (c) in both (d) none of these

Posted by Bhoomika Singh 2 years, 9 months ago

CBSE > Class 07 > Science

5 answers

Bhoomika Singh 2 years, 9 months ago

*Vegetative propagation *Fragmentation *Spore Formation *Budding

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Rounak Yadav 2 years, 9 months ago

Describe the different method of asexual reproduction

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Vidhi Assudani 2 years, 9 months ago

Here in the question the answer is (C)

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Harshita Dagar 2 years, 9 months ago

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Anushri Gupta 2 years, 9 months ago

in both (a) and (b)

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ANSWER

Pg no 209 tablet column

Posted by Sanjana Reddy 2 years, 9 months ago

CBSE > Class 07 > Science

0 answers

ANSWER

Write difference between open stomata and closed stomata

Posted by Vaishnvi Seth 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Prachi M. Parmar 2 years, 9 months ago

Open stomata where exchange of gases takes place during daytimes. This happens in stomatal pores. This is a tiny opening which help plant to breathe. ... Closed stomata happens in night time.

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Write the function of capillaries

Posted by Depali Jena 2 years, 9 months ago

CBSE > Class 07 > Science

3 answers

Aditi Kumari 7A 2 years, 8 months ago

Capillaries: These tiny blood vessels have thin walls. Oxygen and nutrients from the blood can move through the walls and get into organs and tissues. The capillaries also take waste products away from your tissues. Capillaries are where oxygen and nutrients are exchanged for carbon dioxide and waste.

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Saksham Shrivastava 2 years, 9 months ago

To exchange gases

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Aayana Lapse 2 years, 9 months ago

Capillaries are thin walled and help to carry food, blood, oxygen and waste materials to different parts of the body. These capillaries are like branches of arteries and veins

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Battery

Posted by Lucky Rai 2 years, 9 months ago

CBSE > Class 07 > Science

5 answers

Ansh Yadav 2 years, 7 months ago

When two or more cell contented Each other cell is called battery

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Vanshika Pandey 2 years, 9 months ago

When a positive terminal of a cell is connected to negative terminal of next cell such combination of two or more cell is called battery

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Manmeet Singh 2 years, 9 months ago

When two or more cells combined together are called battery.

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Nitya Shukla 2 years, 9 months ago

When two or more cells combined together are called battery.

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Daivik Devadiga 2 years, 9 months ago

A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction.

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Salma takes 15 minutes from her house to reach school on bicycle if the bicycle has a speed of 2 m/s calculate the distance between her house and the school

Posted by Sameer Khan 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Prachi M. Parmar 2 years, 9 months ago

Time taken by Salma to reach her school by bicycle = 15 mins= 15 x 60 = 90 s Speed of Salma’s bicycle= 2m/s speed = Distance covered / Time taken Distance covered = speed x time taken = 2 x 900 = 1800m 1000m = 1km 1800m = 1/1000 x 1800 =1.8kms

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define pulse rate

Posted by Rohan . 2 years, 9 months ago

CBSE > Class 07 > Science

5 answers

Aditi Kumari 7A 2 years, 8 months ago

The number of beats per minute is called the pulse rate

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Nitya Shukla 2 years, 9 months ago

The expansion of an artery each time when blood is forced into it is called an pulse rate

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Prince Kumar 2 years, 9 months ago

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Akshit Kumar Jaswal 2 years, 9 months ago

Sir/mam what is a convex mirror

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Divanshi Banerjee 2 years, 9 months ago

The rythemic beating of heart is known as pulse rate

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FULL FORM OF LPG...? ?

Posted by Jahanvi Singh 2 years, 9 months ago

CBSE > Class 07 > Science

4 answers

Manmeet Singh 2 years, 9 months ago

LIQUID PETROLEUM GAS

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Nitya Shukla 2 years, 9 months ago

Liquified Petrolium Gas

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Akshit Kumar Jaswal 2 years, 9 months ago

Liquid petroleum gas

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Jahanvi Singh 2 years, 9 months ago

LIQUID PETROLEUM GAS

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Images formed by concave mirror

Posted by Lalasa Basangari 2 years, 9 months ago

CBSE > Class 07 > Science

3 answers

Jai Nicu 2 years, 9 months ago

Real,

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Jahanvi Singh 2 years, 9 months ago

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Wajdah Tabassum 2 years, 9 months ago

Real image if object is placed very close then virtual image formed

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8plantnameplaese

Posted by Bhartikilledar. Kushi Killedar 2 years, 9 months ago

CBSE > Class 07 > Science

3 answers

Jahanvi Singh 2 years, 9 months ago

BHARTIKILLEDAE. KHUSHI KILLEDAR HE IS ASKING PLANTS NAME...

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Bhartikilledar. Kushi Killedar 2 years, 9 months ago

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Ansh Yadav 2 years, 9 months ago

Mercury, venus ,suturn ,Earth , mars Neptune , jupiter ,uranus

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Speed =

Posted by Divanshi Banerjee 2 years, 9 months ago

CBSE > Class 07 > Science

3 answers

Akshit Kumar Jaswal 2 years, 9 months ago

A type of distance covered by an object in pecifice time

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Lalasa Basangari 2 years, 9 months ago

Distance/time

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Payal Dora 2 years, 9 months ago

m/s

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1. Assertion: Light travels in a straight line. Reason: Transparent objects allow all the light to pass through them.

Posted by Aaron Varghese 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Divanshi Banerjee 2 years, 9 months ago

Both statements are correct.

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ANSWER

How many planets are there in solar system total

Posted by Durga Prasad Sshu 2 years, 9 months ago

CBSE > Class 07 > Science

5 answers

Ansh Yadav 2 years, 9 months ago

9 this time 8 planet b

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Bhartikilledar. Kushi Killedar 2 years, 9 months ago

8plans

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Vivek Yadav 2 years, 9 months ago

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Divanshi Banerjee 2 years, 9 months ago

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Shree Shukla 2 years, 9 months ago

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How the died person float on water

Posted by Durga Prasad Sshu 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Bhoomika Singh 2 years, 9 months ago

Dead bodies in the water usually tend to sink at first, but later they tend to float, as the post-mortem changes brought on by putrefaction produce enough gases to make them buoyant and also Density of human body decreases when they die.

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Differentiate between image formed by a concave mirror and convex mirror? (Any 5 points)

Posted by Charvy Gowda V 2 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Nitya Shukla 2 years, 9 months ago

Image formed in concave mirror is real whereas image formed in convex mirror is virtual. Image formed in concave mirror can smaller or larger than the object but image formed in convex mirror is always virtual erect and smaller than the object.

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ANSWER

What is chlorophyle

Posted by Shree Shukla 2 years, 9 months ago

CBSE > Class 07 > Science

4 answers

Jahanvi Singh 2 years, 9 months ago

Chlorophyll is a chemical in the chloroplast of plants. It allows plants to absorb and use light.

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Wajdah Tabassum 2 years, 9 months ago

A green pigment present in leaf is called chlorophyll presence of it is leaf is green

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Ansh Yadav 2 years, 9 months ago

A green pigment is called chlorophyll

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Divanshi Banerjee 2 years, 9 months ago

It is a green pigment in plants

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What is the difference between concave and and convex mirror ( write 3 differences)

Posted by Charvy Gowda V 2 years, 9 months ago

CBSE > Class 07 > Science

4 answers

Charvy Gowda V 2 years, 9 months ago

Thank u ❣️ all

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Neha Rani 2 years, 9 months ago

A concave mirror is a spherical mirror with an inwardly curved reflection surface, whereas a convex mirror is a spherical mirror with an outwardly bulged reflecting surface.

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Drishant Mishra 2 years, 9 months ago

(1) In a concave mirror, the outer surface of the sphere is reflecting surface (1) In a convex mirror, the inner surface of the sphere is a reflecting surface. (2) The radius of curvature of a concave mirror is negative. (2) The radius of curvature of a convex mirror is positive. (3) A concave mirror converges all the light rays at a single point. (3) A convex mirror diverges the light rays falling on it.

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Shivangi 4574 2 years, 9 months ago

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An electrician, is carrying out some repairs In your house. He wants to replace a fuse by a piece of Copper wire. Would you agree? Give reasons for your response.

Posted by Shivangi 4574 2 years, 9 months ago

CBSE > Class 07 > Science

4 answers

Nitya Shukla 2 years, 9 months ago

The answer is wrong the correct ans is No l wouldn't agree to replace it by a copper wire because copper wire has less resistance so when too much current will pass through it , it will not melt and wouldn't break due to this there can be a big short circuit.

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Divanshi Banerjee 2 years, 9 months ago

Yes. I would agree, because 'Fuse' is will be more beneficial than copper wire. And fuse will also break the circuit when excessive current will pass through it. It can save us from big disaster's too.

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Shivangi 4574 2 years, 9 months ago

Hello

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Ayush Soni 2 years, 9 months ago

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