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Nutrition in Animals

Which one of the following is true?

a) Canines are well developed
b) Canines are
c) Canines are poorly developed in carnivores
d) Molars are well developed in carnivores

✔Answer

✔Solution

Correct Answer Is : Canines are well developed

Solution Is : Canines are used to tear the flesh of living body, hence carnivores have well developed canines.

Canines are

a) Teeth.
b) Animals.
c) Plants.
d) Muscles.

✔Answer

✔Solution

Correct Answer Is : Teeth.

Solution Is : Canines are teeth used for tearing.

Plants store food as

a) Cellulose.
b) Sugar.
c) Glucose.
d) Starch.

✔Answer

✔Solution

Correct Answer Is : Starch.

Solution Is : Plants store food as starch whose digestion starts in the mouth. The salivary glands secrete the enzyme amylase, which converts the starch into sugar giving the taste of sweetness.

The walls of the large intestine absorb

a) Water
b) Digested food.
c) Undigested food.
d) Cellulose.

✔Answer

✔Solution

Correct Answer Is : Water

Solution Is : The undigested food remains in the small intestine, then passes into the large intestine. Some water is absorbed in the large intestine. The remaining semisolid waste (faeces) is egested through the anus.

Heterotrophy are organisms, which

a) Feed on dead and decaying organisms.
b) Draw nutrition from the living tissues of other organisms.
c) Depend on other sources for food.
d) Manufacture their own food.

✔Answer

✔Solution

Correct Answer Is : Depend on other sources for food.

Solution Is : Nutrition is basically of two types-autotrophic and heterotrophic. Green plants make their own food from simple raw materials, so they are called autotrophs. Other organisms are heterotrophs because they depend on other sources for food.

The hardest part of a tooth is the

a) Dentine.
b) Enamel.
c) Pulp.
d) Gum.

✔Answer

✔Solution

Correct Answer Is : Enamel.

Solution Is : All teeth are coated with enamel, which is the hardest substance in the body. Beneath this is the dentine, which is softer than the enamel.

The organ which does not secrete any enzymes for the digestion of food is

a) Pancreas.
b) Stomach.
c) Kidneys.
d) Small intestine.

✔Answer

✔Solution

Correct Answer Is : Kidneys.

Solution Is : Digestive enzymes are secreted by stomach, pancreas and small intestine. Kidneys are not involved in the process of digestion.They are involved in the excretion of nitrogenous wastes.

Humans develop

a) Two sets of teeth during their lifetime.
b) One set of teeth which lasts for a lifetime.
c) A total of twenty four teeth.
d) A total of sixteen teeth.

✔Answer

✔Solution

Correct Answer Is : Two sets of teeth during their lifetime.

Solution Is : Humans have two sets of teeth which develop during their lifetime. The set of milk teeth has 20 teeth, while the permanent set has 32 teeth.

Food moves in the alimentary canal from one region to another by a process called

a) Locomotion.
b) Pumping.
c) Peristalsis.
d) Diastole.

✔Answer

✔Solution

Correct Answer Is : Peristalsis.

Solution Is : The walls throughout the alimentary canal push the food in a wavelike action called peristalsis. The peristaltic wave propels the food towards the stomach from the oesophagus.

The undigested, semisolid food is collected in

a) Anus.
b) Intestine.
c) Rectum.
d) Villa.

✔Answer

✔Solution

Correct Answer Is : Rectum.

Solution Is : The undigested food is collected and stored in the rectum, to be thrown out from the anus, in the process of egestion.

❑Acids, Bases and Salts
❑Nutrition in Animals
❑Motion and Time
❑Light
❑Heat
❑Forests- Our Lifeline
❑Fibre to Fabric
❑Weather Climate and Adaptations of Animals to Climate
❑Water A Precious Resource
❑Waste Water Story
❑Transportation in Animals and Plants
❑Soil
❑Reproduction in Plants
❑Electric Current And Its Effects
❑Respiration in Organisms
❑Nutrients in Plants
❑Physical and Chemical Changes

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Class 7 Science Study Material

Nutrition in Animals

Which one of the following is true?

Correct Answer Is : Canines are well developed

Solution Is : Canines are used to tear the flesh of living body, hence carnivores have well developed canines.

Canines are

Correct Answer Is : Teeth.

Solution Is : Canines are teeth used for tearing.

Plants store food as

Correct Answer Is : Starch.

Solution Is : Plants store food as starch whose digestion starts in the mouth. The salivary glands secrete the enzyme amylase, which converts the starch into sugar giving the taste of sweetness.

The walls of the large intestine absorb

Correct Answer Is : Water

Solution Is : The undigested food remains in the small intestine, then passes into the large intestine. Some water is absorbed in the large intestine. The remaining semisolid waste (faeces) is egested through the anus.

Heterotrophy are organisms, which

Correct Answer Is : Depend on other sources for food.

Solution Is : Nutrition is basically of two types-autotrophic and heterotrophic. Green plants make their own food from simple raw materials, so they are called autotrophs. Other organisms are heterotrophs because they depend on other sources for food.

The hardest part of a tooth is the

Correct Answer Is : Enamel.

Solution Is : All teeth are coated with enamel, which is the hardest substance in the body. Beneath this is the dentine, which is softer than the enamel.

The organ which does not secrete any enzymes for the digestion of food is

Correct Answer Is : Kidneys.

Solution Is : Digestive enzymes are secreted by stomach, pancreas and small intestine. Kidneys are not involved in the process of digestion.They are involved in the excretion of nitrogenous wastes.

Humans develop

Correct Answer Is : Two sets of teeth during their lifetime.

Solution Is : Humans have two sets of teeth which develop during their lifetime. The set of milk teeth has 20 teeth, while the permanent set has 32 teeth.

Food moves in the alimentary canal from one region to another by a process called

Correct Answer Is : Peristalsis.

Solution Is : The walls throughout the alimentary canal push the food in a wavelike action called peristalsis. The peristaltic wave propels the food towards the stomach from the oesophagus.

The undigested, semisolid food is collected in

Correct Answer Is : Rectum.

Solution Is : The undigested food is collected and stored in the rectum, to be thrown out from the anus, in the process of egestion.

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