1. The tiny openings present on the leaf surface. What are they called?
2. Why do some plants feed on insects?
3. Define parasites.
4. Fungus can be harmful and useful. Give an example showing both of these
traits of fungus.
5. Where is water from undigested food absorbed in the body?
6. What do you understand by term ‘assimilation’ in the process of digestion?
7. Where is saliva produced? Write about its main functions.
8. Which organ in the cow's digestive system differentiate it from that of human
beings?
9. Name some wool yielding animals.
10.What term is used for the process of
Washing of sheep’s fleece to remove dust, dirt, dried sweat and grease.
11.Name the stage next to caterpillar in the life cycle of silk moth.
12. Removing wool from animals body may cause harm to animal. How?
13. Differentiate between land breeze and sea breeze.
14.What steps should be taken while we use clinical thermometer?
Answers
Answer:
1 . The only way for gases to diffuse in and out of the leaf is though small openings on the underside of the leaf, the stomata. These stomata can open and close according to the plant's needs. The tissues of the leaf in between the epidermal cells, into which gases diffuse from the stomata, are called mesophyll
2 . The insectivorous plants grow in soil which do not contain sufficient nitrogen mineral. ... But they do not get the nitrogen from the soil in which they grow. So, insectivorous or carnivorous plants feed on insects to obtain the nitrogen needed for their growth.
3 .A parasitic relationship is one in which one organism, the parasite, lives off of another organism, the host, harming it and possibly causing death. The parasite lives on or in the body of the host. A few examples of parasites are tapeworms, fleas, and barnacles.
4 . Fungus are useful as they act as decomposers and decompose the dead things. Fungus are harmful as they can decompose fruits, grains and plants etc.
5 . food is digested in the mouth, stomach and small intestine. digested food is absorbed into the bloodstream in the small intestine. excess water is absorbed back into the body in the large intestine. any undigested food passes out of the anus .
6 . Assimilation is the movement of digested food molecules into the cells of the body where they are used. For example: glucose is used in respiration to provide energy. ... Photosynthesis, a process whereby carbon dioxide and water are transformed into a number of organic molecules in plant cells.
7 . Produced in salivary glands, saliva is 98% water, but it contains many important substances, including electrolytes, mucus, antibacterial compounds and various enzymes. The digestive functions of saliva include moistening food, and helping to create a food bolus, so it can be swallowed easily.
8 . The main differences between cows and humans in the digestive system are the teeth, mouth, stomach, gut and enzymes. The digestion starts in the mouth with 32 teeth. After getting chewed in the mouth it goes to the Rumen. The Rumen is the main part of a cows four stomachs.
9 . Names of Animals That Give Wool
Sheep. The most common wool animal is the sheep. ...
Goats. Mohair and cashmere come from goats. ...
Lamas. The Lama genus of animals, all of whom originate in South America, includes llamas, alpacas, vicunas and guanacos. ...
Camels. ...
Rabbits. ...
Musk Oxen.
10 . The term used for the process of separation of grains from chaff is called winnowing.
11 . The life cycle of silk moth starts when a female silk moth lays eggs. The caterpillar or larvae are hatched from the eggs of the silk moth. The silkworms feed on mulberry leaves and give rise to pupa.
12 . The excess wool impedes the ability of sheep to regulate their body temperatures. This can cause sheep to become overheated and die. Urine, feces and other materials become trapped in the wool, attracting flies, maggots and other pests. This causes irritation, infections and endangers the health of the animal.
13 . Land air being cooler, it quickly flows to replace the lighter air over the sea. After understanding the basics, one can quickly assess the difference between land breeze and sea breeze.
14 . The reading should be taken by keeping the level of mercury along the line of sight.
Before use, the mercury level should be below 35°C.
Wash the thermometer with water or an antiseptic solution before and after use.
Never hold the thermometer by the bulb while reading it.