1Enrichment of soil with nutrients is done by adding ________________.
(1 Point)
oxygen
nitrogen
salt
water
2Identify the correct definition of saprotrophic plants.
(1 Point)
Plants which are unable to produce a particular organic compound.
Plants which feed upon other living plants.
Plants which feed on insects to obtain nutrients.
Plants which feed on dead and decaying matter.
3Penny bought beautiful shoes for her. But, in the rainy season, her shoes were spoiled because of _________________.
(1 Point)
bacteria
algae
fungi
parasite
4Bile is stored in a sac like structure called_______________.
(1 Point)
kidney
thymus
gall bladder
rectum
5The walls of the large intestine absorb ___________________.
(1 Point)
digested food
undigested food
salt and water
cellulose
6Alpaca is _____________________.
(1 Point)
a kind of leaf on which the silk moth feeds
a stage in the life cycle of a frog
an animal from which wool is obtained
a country which leads in wool production
7Sorting of the wool is associated with ____________________.
(1 Point)
steaming the wool
separating the wool of different textures
colouring the wool
cleaning the wool
8Sorter’s disease is caused by __________________.
(1 Point)
silkworm
pupa
anthrax
rhizobium
9The complete digestion of food takes place in _____________________.
(1 Point)
small intestine
stomach
rectum
anus
10In rumen, the food is partly digested and is called ________________.
(1 Point)
cod
cud
cord
dung
Answers
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Answer:
1.When fertilisers and manures are added to the soil in the fields, then the soil gets enriched with nutrients like nitrogen, phosphorus and potassium, etc. The crop plants can then grow well in this soil. Fertilisers and manures provide essential nutrients for the growth of plants so that we get healthy plants.
answer:- Nitrogen
2.A saprophyte or saprotroph is an organism which gets its energy from dead and decaying organic matter. This may be decaying pieces of plants or animals.
answer:-Plants which feed on dead and decaying matter.
3.Penny bought her beautiful shoes which she wore on special occasions, were spoiled by fungi during the rainy season.
answer:-fungi
4.Liver (the largest gland in human body) secretes bile juice that is stored in a sac called the gall bladder. The bile helps in the digestion of fats.
answer:- gall bladder
5.The large intestine has 3 primary functions: absorbing water and electrolytes, producing and absorbing vitamins, and forming and propelling feces toward the rectum for elimination.
answer :- salt and water
6.The alpaca (Vicugna pacos) is a species of South American camelid mammal. It is similar to, and often confused with, the llama. However, alpacas are often noticeably smaller than llamas. The two animals are closely related and can successfully cross-breed.
Alpaca fiber is the strongest natural fiber known to man and has an insulating value from three to five times higher than sheep's wool. These properties, when combined with exceptional softness and luster, make alpaca one of the most valuable textile fibers in the world today.
answer:-an animal from which wool is obtained
7.The first process at the mill is sorting. The fleece is sorted into grades by individuals who have developed a keen sense of touch. They sort the fibers according to fineness, length, and color. Each wool product is made from a different type of fiber, and the sorter divides the fleece accordingly.
answer:-separating the wool of different textures
8.Sorter's Disease is another name for Anthrax. It is caused by the bacteria Bacillus anthracis. Historically, anthrax was called wool sorter's disease because individuals who sorted wool of infected animals contracted the disease.
answer:- anthrax
9.The small intestine is where most chemical digestion occurs. After the stomach empties the food and juice mixture into the small intestine, the juices of two other digestive organs mix with the food to continue the process of digestion.
answer:-small intestine
10.Rumen forms the first stomach and is four-chambered. Here, food is partially digested and is called the cud.
answer:-cud
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