What are villi? What is their location and function?
Villi are the finger-like projections or outgrowth. They are present in the small intestine of our digestive system. The villi increase the surface area for absorption of the digested food. Location _ small intestine Function _ Digestion of food Absorption of food
Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?
Fruits and vegetable crops are grown in large greenhouses because it protects crops from external climatic condition and to provide suitable temperature for the growth of crops. Advantages to farmers while growing fruits and vegetable crops inside greenhouses are It protects crops from diseases and adverse climatic conditions. It protects crops from wind and rodents …
Name the following:
i) A parasitic plant with yellow, slender and branched stem. ii) A plant that is partially autotrophic. iii) The pores through which leaves exchange gases. ANSWER i) Cuscuta ii) Pitcher plant iii) Stomata
Give a brief description of the process of synthesis of food in green plants
Green plant make their own food by the process is called as photosynthesis . The process is as follows Water is taken from the roots of the plant, and it is transported to the leaves of the plant. Carbon dioxide from air enter the leaves through pores called stomata. This diffuses the cell containing chlorophyll. …
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. How would you test the presence of starch in leaves?
Take two potted plants of the same kind. Keep one in the dark for 3 to 4 days and the other in sunlight. Perform the iodine test with the leaves of both the plants as given below. Now leave the pot which was earlier kept in the dark, undisturbed for 3 – 4 days and …
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2. Distinguish between a parasite and a saprophyte.
Answer Saprophytes Parasites Acquire nutrients from dead and decaying matter Parasites live on or in a host and get its food at the expense of its host eg Fungi , Mushroom etc. eg roundworm, tape worm etc.
1. Why do organisms take food?
All organisms require energy for their life processes. Plants prepare their food and acquire nutrients from abiotic components (soil, air, water and sunlight). Animals need to get food from either plants or other animals to obtain nutrients , hence animals need to take food to acquire nutrients and energy.