(b) The foods synthesized by the plants are stored as. (c) In photosynthesis solar energy is captured by the pigment called.

Transcription

1 WORKSHEET -1 CHAPTER- HOW DO PLANTS LIVE SUBJECT-BIOLOGY GRADE:7 LEVEL 1 1. Fill in the blanks: (a) Green plants are called since they synthesize their own food. (b) The foods synthesized by the plants are stored as. (c) In photosynthesis solar energy is captured by the pigment called. (d) During photosynthesis plants take in and release. 2. : Name the following : (a) A parasitic plant with yellow, slender, tubular stem. (b) A plant that has both autotrophic and heterotrophic mode of nutrition. (c) The pores through which leaves exchange gases. 3. Tick the correct answer : (a) Amarbel is an example of - (i) Autotroph (ii) Parasite iii) Saprotroph (iv) Host (b)the plant which traps and feeds on insects is - (i) Cuscuta (ii) China rose (iii) Pitcher plant (iv) Rose LEVEL II 1. COMPLETE THE GRID: PLANTS NAME MODE OF NUTRITION

2 Level III 1. Differentiate between autotroph and heterotrophs by giving an example. 2. How amarbel draws its nutrients from the host? Explain **************************************

3 WORKSHEET -2 CHAPTER- HOW DO ANIMALS TAKE FOOD SUBJECT-BIOLOGY GRADE:7 LEVEL 1 1) Label the parts of the digestive tube / system. 2)Explain the role of the large intestine in the process of nutrition. 3) Write a line each on the functions of the following: a) Mucous in the stomach: b) Hydrochloric acid:

4 c) Bile: d) Pancreatic juice: e) Intestinal Juice: f) Saliva: LEVEL II 4) Following is a list of mode of feeding in different animals. Write down the names of animals against the different modes. Mode of feeding Names of animals Scraping Capturing Sucking Siphoning Swallowing Chewing 5) What is the difference between milk and permanent set of teeth? 6) How can you differentiate between peristalsis and reverse peristalsis? Give an example of reverse peristalsis.

5 LEVEL III 7) Answer the questions taking cow as an example. 1. Can we digest grass? 2. How can the animals like cows digest grass? 3. What are the special structures that are present in their digestive system? *************************************

6 WORKSHEET -3 CHAPTER- TRANSPORT OF SUBSTANCESIN PLANTS AND ANIMALS SUBJECT-BIOLOGY Level 1 GRADE:7 LEVEL I 1 Fill in the blanks. i. The blood from the heart is transported to all parts of the body by the. ii. Haemoglobin is present in cells. iii. Arteries and veins are joined by a network of. iv. The rhythmic expansion and contraction of the heart is called. 2. What are the components of blood? 3. Name the only vein which carry oxygen-rich blood? 4. Differentiate these- Arteries and veins (4 differences) LEVEL II 1. What are the advantages and disadvantages of transpiration in plants. 2. How does water move up in tall trees.

7 3. What would happen if excretory waste products collected in our body? LEVEL III 1. Name the process by which unicellular and some simple multi cellular organisms meet the requirement of oxygen or water from their surroundings. 2. Mark the following statements as true or false. Rewrite the false statements correctly in the given space. a) The blood is sent to all the parts of the body from the right side of the heart through aorta. b) Blood gets its red colour due to haemoglobin present in plasma. c) White blood cells fight diseases and infections. d) The pulmonary vein carries blood from the heart to the lungs. e) Your pulse rate increases when you are cycling.

8 Label the given diagram:

9 WORKSHEET -4 CHAPTER- MULTIPLICATION IN PLANTS SUBJECT-BIOLOGY Level-1 Choose the correct answers: 1. The reproductive part of a plant is the (i) leaf (ii) stem (iii) Root (iv) flower GRADE:7 2. The process of fusion of the male and the female gametes is called (i) fertilization (ii) pollination (iii) Reproduction (iv) seed formation 3. Mature ovary forms the (i) seed (iii) pistil 4. A spore producing plant is (i) rose (iii) potato (ii) stamen (iv) fruit (ii) bread mould (iv) ginger Level-2 Fill in the blanks (a) Production of new individuals from the vegetative part of parent is called (b) A flower may have either male or female reproductive parts. Such a flower is called (c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as (d) The fusion of male and female gametes is termed as (e) Seed dispersal takes place by means of

10 (f) Asexual reproduction in spirogyra is an example of (vegetative propagation, unisexual, flower, pollination, fertilization, wind, water and animals, fragmentation, spores) Level-3 1. Look at the pictures below. Write numbers on the lines above each picture to show the correct order in which pollination and fertilization happen. The male nucleus from the pollen joins the nucleus in the egg cell. This is fertilisation. An embryo forms. It is found inside a seed inside a fruit. The pollen grain grows a pollen tube. It grows towards the egg cell. The pollen grain lands on the stigma. This is pollination. 2. Draw lines from the label boxes above to indicate what each picture shows. 3. On the diagrams label each of the following parts once. egg cell, fruit, ovary, pollen grain, pollen tube, seed, stigma, style *********************************

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