NCERT Class 7 Science — Chapter 1: Nutrition in plants

With reference to the mode of nutrition in living organisms, consider the following statements: 1. Autotrophic nutrition is the mode where organisms take in food prepared by others. 2. Animals are classified as heterotrophs. 3. The term ‘heterotrophs’ refers to organisms that depend on others for nourishment. Which of the statements given above are correct?

With reference to the cell structure described in the text, consider the following statements: 1. The cell membrane encloses the cell and controls the movement of substances. 2. The nucleus is a jelly-like substance that fills the entire cell. 3. Cytoplasm is the hard outer covering found only in plant cells. Which of the statements given above is/are correct?

Consider the following statements about algae: 1. They are generally formed by the growth of organisms in stagnant water. 2. They appear green because they lack chlorophyll. 3. They are autotrophs and can prepare their own food. Which of the statements given above is/are correct?

Consider the following statements regarding insectivorous plants like the Pitcher plant: 1. They trap insects primarily to obtain carbohydrates. 2. They contain chlorophyll and can perform photosynthesis. 3. The pitcher-like structure is a modified part of the leaf. Which of the statements given above are correct?

With reference to saprotrophic nutrition, consider the following statements: 1. It is a mode of nutrition where organisms take in nutrients from dead and decaying matter. 2. Fungi ingest dead matter directly without secreting digestive juices. 3. All fungi are harmful and cause spoilage of food and diseases. Which of the statements given above is/are correct?