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Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulse crops like green gram, bengal gram, black gram, etc. do not apply nitrogenous fertilizers during cultivation. Why?

Farmers who cultivate pulse crops like green gram, Bengal gram, black gram, etc. do not apply nitrogenous fertilizers during cultivation because... View Article

Unscramble the following to form terms related to modes of nutrition. (i) RASPAEIT (ii) ROPEHYTSAP (iii) TOROPHAUT (iv) SIBIOMSYS

(i) PARASITE A parasite is a plant or an animal that lives on, or with, or inside a larger species extracting nutrients. In some cases, the... View Article

A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves?

In plants, if the leaves are not present there to produce food then plants can easily survive for a few days. If leaves are absent, the stored... View Article

Photosynthesis requires chlorophyll, and a few other raw materials. Add the missing raw materials to the list given below: Water, minerals, _, __.

Photosynthesis requires Water, Minerals, Carbon dioxide, and Sunlight. During the photosynthesis process, light energy gets converted into... View Article

Potato and ginger are both underground parts that store food. Where is the food prepared in these plants?

Shoot system and leaves of a potato and a ginger are on the upper side of the ground. They prepare their food by the procedure of... View Article

Which of the following raw material is available in the air for photosynthesis? (a) Oxygen (b) Carbon dioxide (c) Nitrogen (d) Hydrogen

b) Carbon dioxide The carbon dioxide is used as a raw material for the photosynthesis process in plants to prepare food and release... View Article

Two organisms are good friends and live together. One provides shelter, water, and nutrients while the other prepares and provides food. Such an association of organisms is termed as (a) saprophyte (b) parasite (c) autotroph (d) symbiosis

d) Symbiosis Symbiosis refers to the close relationship amongst two different organisms or living things belonging to different... View Article

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? (a) Stomata (b) Lamina (c) Midrib (d) Veins

a) Stomata Stomata are the tiny openings present on the epidermis of leaves. We can see stomata under the light microscope. In some of the... View Article

The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is (a) autotrophic (b) insectivorous (c) saprophytic (d) parasitic

c) Saprophytic In saprotrophic mode of nutrition, the vital nutrients required for their body are collected from dead and decaying matter. The... View Article

Pitcher plant traps insects because it (a) is a heterotroph. (b) grows in soils which lack nitrogen. (c) does not have chlorophyll. (d) has a digestive system like human beings.

(b) grows in soils which lack nitrogen. Pitcher plants trap insects in its modified trap-like organ to fulfil its requirements of Nitrogen and... View Article

Which of the following statements is/are correct? (i) All green plants can prepare their own food. (ii) Most animals are autotrophs. (iii) Carbon dioxide is not required for photosynthesis. (iv) Oxygen is liberated during photosynthesis. Choose the correct answer from the options below: (a) (i) and (iv) (b) (ii) only (c) (ii) and (iii) (d) (i) and (ii)

a) (i) and (iv) All green plants can prepare their own food by the process called photosynthesis. Carbon dioxide and water required for the... View Article

Organisms which prepare food for themselves using simple naturally available raw materials are referred to as (a) heterotrophs (b) autotrophs (c) parasites (d) saprophytes

b) Autotrophs Autotrophs are producers which prepare their own food. These can be classified as photoautotrophs and chemoautotrophs. They... View Article

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

b) Chlorophyll The green pigment that presents in plant's leaves is termed as “Chlorophyll”. In the leaves, chlorophyll absorbs energy from the... View Article

Why are the Arabari forests of Bengal known to be a good example of conserved forest?

Arabari forests are a good example of conserved forest because local people were involved in conservation programmed to conserve the Arabari... View Article

What is the importance of the forest as a resource?

Forests help in maintaining the temperature and oxygen level of the atmosphere. Plants release oxygen during photosynthesis and consume carbon... View Article

Suggest a few useful ways of utilising wastewater.

Waste water can be used for the following ways: For recharging the ground water. Can be used for irrigation. Treated municipal water can be used... View Article

Is water conservation necessary? Give reasons.

Water conservation is very important as it is very important factor for the existence of life. Water distribution is uneven and large... View Article

Prepare a list of five activities that you perform daily in which natural resources can be conserved or energy utilisation can be minimised.

Natural resources are the parts of the environment that are highly important to humans, whether they in one form or the other. Natural resources... View Article

In the context of conservation of natural resources, explain the terms reduce, recycle and reuse. From among the materials that we use in daily life, identify two materials for each category.

Reduce - Electricity and water Recycle - Plastic cups, paper, and metal objects Reuse - Used envelopes, plastic carry bags, and bottles of jam... View Article

(i) Locate and name the water reservoirs in Figures (a) and (b). (ii) Which has an advantage over the other and why?

Figures16.1 (a) is a pond ecosystem and Figures16.1 (b) is an underground waterbody Groundwater body has more advantages than the pond... View Article

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