What would happen, if a goat eats away all the leaves of a small plant

When a goat eats all the leaves of a small plant. Still new leaves could be seen sprouting in the plant again. This is just because the small plant survived on the food stored in the stem and roots. It might have undergone gaseous exchange through lenticels on stem.

“Leaves are the food factories of plant”. But, how does cactus (desert plants) carry out photosynthesis?

Photosynthesis also takes place in other green parts of the plant — in green stems and green branches. The desert plants have scale- or spine-like leaves to reduce loss of water by transpiration. These plants have green stems which carry out photosynthesis.

Which part of the plant gets carbon dioxide from the air for photosynthesis?

Generally, leaves are the food factories of plants. The synthesis of food in plants occurs in leaves. Carbon dioxide from air is taken in through the tiny pores present on the surface of the leaves. These pores are surrounded by ‘guard cells’. Such pores are called “stomata”.

Which of the following statement is or are incorrect about the growing crops inside green-houses?

A greenhouse is built of any material through which light can pass, such as glass or plastic. Farmers get many advantages like the crops grow well.

Two organisms are good friends and live together. One provides shelter, water and nutrients while the other three prepares and provides food. Such an association of organisms is termed as: saprophyte parasite autotrophs Symbiosis

Symbiosis is an association between two different organisms that live together and help each other to survive, e.g. lichen (association between an alga and fungus).

The cell is enclosed by a thin outer boundary, called

The bodies of living organisms are made of tiny units called “cells”. Cells can be seen only under the microscope. Some organisms are made of only one cell. The cell is enclosed by a thin outer boundary, called the “cell membrane”.

The food synthesised by the plants is stored as

Chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis. During the process oxygen is released. The carbohydrates ultimately get converted into starch. The presence of starch in leaves indicates the occurrence of photosynthesis. The starch is also a carbohydrate.

A plant that has both autotrophic and heterotrophic mode of nutrition

Pitcher plant derives nutrition just the way any other plant does. It takes water and minerals from the soil and food by photosynthesis. But the soil in which it grows doesn't has nitrogen so it uses the pitcher for killing small insects and then digesting them to derive nitrogen from the animal.

About “Mosquito”, which of the following statement is incorrect?

All mosquitoes breed in water. A mosquito during its life cycle passes through different modes of nutrition. The larva feeds on microorganisms. The Adult female feeds on blood to supply proteins for eggs and adults of both sucks feed on plant nectar. So, it is most appropriate to considered them as an omnivore.

In photosynthesis process, solar energy is converted into which energy

The leaves have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesise (prepare) food where solar energy is converted into chemical energy.

Which of the statements is or are incorrect?

Pitcher plant has modified leaves that help to trap insect to obtain nitrogen compounds. Thus, it is an insectivorous plant.

In non-green plants and animals, their mode of nutrition is

The process by which living organisms obtain their food is called “mode of nutrition”. In non-green plants and animals, their mode of nutrition is “heterotrophic”, as they obtain food from plants or other animals.

The term that is used for the mode of nutrition in yeast, mushrooms and bread mould is: autotrophic insectivorous saprophytic parasitic

Saprophytic nutrition is scene in yeast, mushroom and bread mould. In this mode of nutrition, organisms obtain their food from dead and decaying organic matter. Such organisms are known as saprophytes.

Which of the following statements is or are correct?

The mode of nutrition is which organisms depend on other for their food is called heterotrophic nutrition. An organism that takes their food or nutrient from others, without giving anything in return, called “parasitic nutrition”. And the body in which he lives is called a “host” and they take nutrients from the body of host and gradually parasite harms them and possible causing death.

The term that is used for the mode of nutrition in yeast, mushrooms and bread-mould is

These organisms (yeast, mushrooms and bread-mould) are called “fungi”. They have a different mode of nutrition. They secrete digestive juices on the dead and decaying matter and convert it into a solution. Then they absorb the nutrients from it. This mode of nutrition in which organisms take in nutrients in solution form from dead and decaying matter is called “saprotrophic nutrition”. Plants which use saprotrophic mode of nutrition are called “saprotrophs”.

About “photosynthesis”, which of the statements is or are incorrect?

Chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis. During the process oxygen is released. The carbohydrates ultimately get converted into starch. The presence of starch in leaves indicates the occurrence of photosynthesis. The starch is also a carbohydrate.

Paheli wants to know that some plants have deep red, violet or brown colored leaves but can these leaves perform the process of photosynthesis?

Yes, because the chlorophyll needed for photosynthesis is hiding within the leaf colour. Plant leaves contain chlorophyll as “Carotenoids” and “Anthocyanins”. These assist chlorophyll in the process of photosynthesis.

Paheli asked to boojho that “Can you solve the following riddle - I am white and soft. I grow well in the rainy season. Children pluck me from the ground and admire me. But I absorb nutrients from dead animals and plants”.

Mushroom is an example of saprophytes. Mushroom is a fungus which grows under the warm condition on dead parts of plant (e.g. rotting wood of a dead tree) and animals. They obtain nutrition from decaying organic matter. So, they are saprophytes.

Which of the following statement is or are correct?

Statement [A] is correct. All green plants are autotrophs. They can make their own food from simple substances like CO2 and H2O by the process of photosynthesis. Oxygen gas produced during this process is liberated into the air. The other statements in correct form are: Most animals are heterotrophs and CO2 is essential for photosynthesis.

The tissue responsible for the transportation of food in plants

Phloem is the tissue in plants that transport food to the parts of the plant where it needs to go. Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibres, and phloem parenchyma cells.

When we observe the lower surface of a leaf through a magnifying lens, we see numerous small openings. Which of the following is the term given to such openings?

Stomata are the numerous small openings observed on the lower surface of a leaf. Each of these pores is surrounded by a pair of guard cells. The stomata help in the exchange of gases (CO2 goes in and O2 is released out).

Farmers do not apply nitrogenous fertilizers in the cultivation of pulses plant. Why?

Generally, leguminous plant such as gram, pulses. These plants have root nodules in them which have a symbiotic association with rhizobium bacteria. It converts nitrogen gases as compounds. In return, the plants provide food and shelter to the bacteria. Hence, farmers do not need to apply nitrogenous fertilizers in the field during cultivation.

Photosynthesis requires chlorophyll and a few other raw materials as

Photosynthesis is a process by which green plants make their own food from CO2 and H2O by using solar energy in the presence of chlorophyll. During the process oxygen is released.

Which of the following equations is correct about “photosynthesis”?

Plants synthesise their food with the help of chlorophyll. It helps to capture the energy of Sunlight. Plants get raw materials form surroundings. So, we find that sunlight, chlorophyll, carbon dioxide and water are necessary components to carry out the process of photosynthesis. And carbohydrates produced and ultimately converted into starch. During this process oxygen is released which is very essential for the survival all living organisms.

Which of the following is parasite?

A yellow tubular structures twining around the stem and branches of a tree. This is a plant called “Cuscuta” (Amarbel). It does not have chlorophyll. It takes readymade food from the plant on which it is climbing. As it deprives valuable nutrients, from the body of host. Hence, it is called a parasite.

What would happen, if a goat eats away all the leaves of a small plant

When a goat eats all the leaves of a small plant. Still new leaves could be seen sprouting in the plant again. This is just because the small plant survived on the food stored in the stem and roots. It might have undergone gaseous exchange through lenticels on stem.

We see slimy, green patches in ponds or in other stagnant water bodies. These are generally formed by the growth of organisms called “algae”. They contain chlorophyll. Algae can also prepare their own food by photosynthesis, so they are known as “Autotrophs”. We have also seen fluffy patches of white, green, brown color growing on rotting wood during the rainy season. These organisms are called “fungi”. They take in nutrients in solution form from dead and decaying matter, called “Saprotrophs”.

Which of the following statement is or are incorrect about the growing crops inside green-houses?

A greenhouse is built of any material through which light can pass, such as glass or plastic. Farmers get many advantages like the crops grow well.

Choose the incorrect statements, what happened when wheat dough left in the open, after a few days

Carbohydrate in wheat to encourage the growth of yeast and other saprophytic fungi. They breakdown carbohydrates into simpler compounds like carbon dioxide and alcohol that leads to a foul smell.

Organisms which prepare food for themselves using simple naturally available raw materials are referred to as

Autotrophs are organisms that make food themselves from simple substances like water, CO2 in the presence of sunlight and chlorophyll, e.g. Green plants. Heterotrophs are organisms, which cannot make their own food and take in food prepared by the plants, e.g. Animals and humans Parasites are organisms, which live and derive nutrition from another organisms, called host, e.g. Cuscuta plant. Saprophytes are organism, which obtain nutrition from dead and decaying organic matter, e.g. Fungi, bacteria etc.

Class 7 Science Chapter 1 MCQ

Class 7 Science Chapter 1 MCQ (Multiple Choice Questions) of Nutrition in Plants. All the MCQs are selected form the Class 7 Science NCERT Book Chapter 1 only including all the important topics, main questions, keywords based questions and short questions from exercise.

Answers and Explanation of each question is given along with the question. Important questions related to chapter 1 of 7th science are also given for revision.

Class 7 Science Chapter 1 MCQ for 2020-21

Class:	7
Subject:	Science
Contents:	Multiple Choice Questions – MCQ Tests

Class 7 Science Chapter 1 MCQ for Exams

Class 7 Science Chapter 1 MCQs are given below with answers and explanation of each answer. There are over 20 set of papers each containing 5 questions for practice. All the questions are prepared from NCERT textbook and exemplar books only. All the questions are confined to CBSE Syllabus 2020-21.

Food is essential for all living organisms because

[A]. It provides energy

[B]. It helps in growth and repair cells

[C]. It protects our body from various diseases

[D]. All of these

View Answer

Pitcher plant traps insect because it

[A]. is a heterotroph.

[B]. grows in soils which lack in nitrogen.

[C]. does not have chlorophyll.

[D]. has a digestive system like human beings.

Pitcher plant traps insects because it

[A]. Is a heterotroph

[B]. Grows in soils which lack in nitrogen

[C]. Does not have chlorophyll

[D]. Has a digestive system like human beings

View Answer

In the absence of which of the following will photosynthesis not occur in leaves?

[A]. Guard cells

[B]. Chlorophyll

[C]. Vacuole

[D]. Space between cells

Why insectivorous plants trap insects?

[A]. They can’t get sufficient nutrients, as nitrogen, from soil.

[B]. They want to take sometimes different nutrition as juices of insects.

[C]. They are autotrophs and some autotrophs are not able to make food.

[D]. Once in a week, they used their digestive system.

View Answer

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Why do all living being need food?

All living organisms require food for cellular activities like growth, development and physical activities.

Who are Autotrophs?

Organisms which make their own food are called Autotrophs like plants.

What do you mean by Photosynthesis?

Photosynthesis is the process by which plants make their own food.

How do green plants prepare their food?

Green plants use water, carbon dioxide and sunlight to prepare their food by the process of photosynthesis.

Chlorophyll and Photosynthesis

When we see around us, we find that most of the plant leaves are green in colour. It is because leaf cells contain green pigments called Chlorophyll. The photosynthesis happens at this site of leaf’s cell. Chlorophyll helps in trapping of sun light energy. Water is absorbed by the root hairs from the soil and carbon dioxide coming from atmosphere is taken in through the stomata of leaf. Water and carbon dioxide combine in presence of sunlight trapped by chlorophyll and produces glucose and releases oxygen into the atmosphere. This complete process is called Photosynthesis.

Currently in Class test of standard 7 or school exams, MCQs are compulsory in each subject. These MCQs will help the students to understand the concepts given in Chapter 1 of Class 7 Science. Definitions, keywords and all extra questions are included in the form of multiple choice questions to provide a better practice for grade 7 student.

Class 7 Science Chapter 2 MCQ »

Class 7 Science Chapter 1 MCQ

Class 7 Science Chapter 1 MCQ for 2020-21

Class 7 Science Chapter 1 MCQ for Exams

Food is essential for all living organisms because

Pitcher plant traps insect because it

Pitcher plant traps insects because it

In the absence of which of the following will photosynthesis not occur in leaves?

Why insectivorous plants trap insects?

Why do all living being need food?

Who are Autotrophs?

What do you mean by Photosynthesis?

How do green plants prepare their food?

Chlorophyll and Photosynthesis

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Class 7 Science Chapter 1 MCQ

Class 7 Science Chapter 1 MCQ for 2020-21

Class 7 Science Chapter 1 MCQ for Exams

Food is essential for all living organisms because

Pitcher plant traps insect because it

Pitcher plant traps insects because it

In the absence of which of the following will photosynthesis not occur in leaves?

Why insectivorous plants trap insects?

Why do all living being need food?

Who are Autotrophs?

What do you mean by Photosynthesis?

How do green plants prepare their food?

Chlorophyll and Photosynthesis

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