CBSE Class 10 Biology Food Production MCQs Set 04

Answer: (a) Gramineae

Explanation:
1. Rice, wheat, maize and other cereals are grasses of the family Gramineae.

Teacher's Note:
1. Pulses belong to the family Fabaceae.
2. Cereals give carbohydrates.

Answer: (d) inflorescence

Explanation:
1. The head of cauliflower is a mass of young flower buds, that is, an inflorescence.

Teacher's Note:
1. Carrot and radish are roots; onion is a bulb.
2. Know the edible part of every common vegetable.

Answer: (a) Brassica campestris

Explanation:
1. Mustard seeds come from Brassica campestris. Theobroma gives cocoa and Coffea gives coffee.

Teacher's Note:
1. Learn each scientific name with its product.
2. Brassica also includes cabbage and cauliflower.

Answer: (d) Tomato

Explanation:
1. Tomato develops from the ovary of a flower, so botanically it is a fruit. Carrot and radish are roots and onion is a bulb.

Teacher's Note:
1. Brinjal and gourds are fruits too.
2. Botany classifies by the part of the plant, not by taste.

Answer: (a) protein

Explanation:
1. Soyabean contains a high percentage of good-quality protein with almost all essential amino acids.

Teacher's Note:
1. It is a pulse and a good meat substitute.
2. It is also an oil seed.

Answer: (d) enter the food chain and undergo biomagnification

Explanation:
1. Poisonous pesticides pass along the food chain and become more concentrated at each level, harming top consumers.

Teacher's Note:
1. DDT is a classic example.
2. Biological control is safer.

Answer: (d) Both cytokinin and auxin

Explanation:
1. A suitable balance of auxin and cytokinin in the culture medium makes the callus form roots and shoots.

Teacher's Note:
1. Plant tissue culture needs a sterile medium.
2. It is used for disease-free plants.

Answer: (b) pulses

Explanation:
1. Rhizobium lives in root nodules of pulses (legumes) and fixes nitrogen.

Teacher's Note:
1. This is why pulses follow cereals in rotation.
2. The relationship is symbiosis.

Answer: (c) coir

Explanation:
1. The fibre from coconut husk is coir, used for ropes and mats.

Teacher's Note:
1. Jute comes from Corchorus and hemp from Cannabis.
2. Coconut is also an oil seed.

Answer: (c) harmful as well as useful insects

Explanation:
1. DDT is a non-selective insecticide, so it kills useful insects such as bees and ladybirds with the pests.

Teacher's Note:
1. That is one reason for its limited use.
2. Indiscriminate killing upsets the food web.

Answer: (a) polyploidy

Explanation:
1. Colchicine blocks spindle formation, so chromosomes double without cell division and the cell becomes polyploid.

Teacher's Note:
1. Polyploid plants may be seedless or larger.
2. Seedless watermelon is an example.

Answer: (b) Daucus carota

Explanation:
1. Daucus carota is carrot, rich in carotene that the body turns into vitamin A.

Teacher's Note:
1. Brinjal, radish and potato are not rich in carotene.
2. Yellow fruits are good sources too.

Answer: (c) improving indigenous breeds

Explanation:
1. Foreign sheep such as Merino are crossed with local sheep to improve wool and meat quality of the indigenous breeds.

Teacher's Note:
1. Sheep and goat do not form a fertile hybrid.
2. Cross-breeding is a method of improving animals.

Answer: (a) ILS 82

Explanation:
1. ILS 82 is a high-yielding layer strain of chicken. 2,4-D is a weedicide, IR 8 is rice and Ganga 101 is maize.

Teacher's Note:
1. B 77 is another strain.
2. These come from crossing with White Leghorn.

Answer: (d) Aspergillosis

Explanation:
1. Aspergillosis of poultry is caused by the fungus Aspergillus. The other three diseases are caused by viruses (the dermatitis of cattle in the lesson is viral).

Teacher's Note:
1. Group animal diseases by the type of germ.
2. Vaccines exist for many viral diseases.

Answer: (c) wool

Explanation:
1. Hissar is a breed of sheep reared for its wool.

Teacher's Note:
1. Pashmina comes from a Kashmiri goat.
2. Wool is the hair of sheep and goats.

Answer: (d) Tuna

Explanation:
1. Tuna lives in the sea; Catla, Rohu and Mrigal are freshwater carps.

Teacher's Note:
1. Mackerel and Bombay duck are marine too.
2. Marine catches are stored in ice.

Answer: (d) yak

Explanation:
1. The yak is adapted to high, cold mountain regions and is used there for milk, wool and carrying loads.

Teacher's Note:
1. Camels do the same work in deserts.
2. Match each animal to its habitat.

Answer: (c) hairs

Explanation:
1. Fur is the fine hair of animals such as rabbit, fox and beaver.

Teacher's Note:
1. Leather comes from skin.
2. Horns give buttons and combs.

Answer: (b) bullock

Explanation:
1. Bullocks, which are castrated bulls, supply most of the draught power on Indian farms.

Teacher's Note:
1. Mules and hinnies are sterile hybrids used for loads.
2. Camels are draught animals in deserts.

Answer: (c) both marine and inland fisheries

Explanation:
1. Aquaculture is the rearing and harvesting of aquatic animals in both sea water and fresh water.

Teacher's Note:
1. Pisciculture is the culture of fish.
2. Prawns are cultured in the sea.

Answer: (d) pituitary hormone

Explanation:
1. Pituitary extract makes carps breed in ponds, where they otherwise do not spawn.

Teacher's Note:
1. This is called induced breeding.
2. Fingerlings are then reared in nurseries.

Answer: (d) livestock

Explanation:
1. Livestock is the general term for all farm animals kept for food and other products.

Teacher's Note:
1. Cattle means cows and buffaloes only.
2. Poultry is birds and fishery is fish.