(a) What is photosynthesis? Name the components used for photosynthesis. 3
(b) What is meant by the following terms?
(i) Rearing (ii) Shearing (iii) Sericulture
(c) What are villi? What is their location and function?
Answers
Explanation:
Photosynthesis is a multi-step process that requires sunlight, carbon dioxide, and water as substrates. It produces oxygen and glyceraldehyde-3-phosphate (G3P or GA3P), simple carbohydrate molecules that are high in energy and can subsequently be converted into glucose, sucrose, or other sugar molecules.
Rearing: The process of keeping, breeding and feeding the animals, birds, insects for obtaining resources from them is called rearing.
Shearing, also known as die cutting, is a process which cuts stock without the formation of chips or the use of burning or melting. Strictly speaking, if the cutting blades are straight the process is called shearing; if the cutting blades are curved then they are shearing-type operations.
the production of silk and the rearing of silkworms for this purpose.
Explanation:
a) Photosynthesis is a multi-step process that requires sunlight, carbon dioxide, and water as substrates. It produces oxygen and glyceraldehyde-3-phosphate (G3P or GA3P), simple carbohydrate molecules that are high in energy and can subsequently be converted into glucose, sucrose, or other sugar molecules.
b) i) Rearing: The process of keeping, feeding, breeding and medical care of useful animals is called rearing of animals. These animals produce one or more useful products for htiman beings.
(ii) Shearing: The process of removing the fleece of the sheep alongwith thin layer of skin is called shearing.
(iii) Sericulture, also called silk farming, is the process of making silk fibers. It starts by raising silkworms and then processing the fibers they produce. ... The thread can then be twisted into silk yarn or woven into silk cloth (fabric).
c) The small intestine has millions of tiny finger-like projections called villi. These villi increase the surface area for more efficient food absorption. Within these villi, are present numerous blood vessels which absorb the digested food and carry it to the blood stream. It is hence from the blood stream, the absorbed food is delivered to each and every cell of the body.