Practice: Plants – Structure and Agriculture

A) Root → Stem → Leaves → Flower → Fruit
B) Stem → Root → Leaves → Fruit → Flower
C) Leaves → Root → Stem → Flower → Fruit
D) Root → Leaves → Stem → Fruit → Flower

A) Root – prepares food
B) Leaf – absorbs water and minerals
C) Stem – transports water, minerals and food
D) Flower – anchors plant in soil

A) Fibrous root system
B) Tap root system
C) Adventitious root system only
D) No root system at all

A) Root
B) Stem
C) Leaf
D) Fruit / grain

A) Water only
B) Food for the developing embryo
C) Chlorophyll for photosynthesis
D) Air for germination

A) Potato – modified stem used as vegetable
B) Carrot – modified flower used as spice
C) Onion – modified root used as cereal
D) Ginger – modified leaf used as pulse

A) Falling of flowers before fruit set
B) Bending and falling of stems near ground due to wind or rain
C) Drying of leaves during summer
D) Germination of seeds inside fruit on plant itself

A) Decrease air flow inside the tree
B) Reduce fruit size permanently
C) Improve sunlight penetration and fruit quality
D) Stop photosynthesis in leaves completely

A) Leaf – carrot
B) Root – cabbage
C) Stem – sugarcane
D) Flower – potato

A) Absorbing minerals from soil
B) Transporting food to fruits
C) Exchange of gases and loss of water vapour
D) Anchoring plant firmly in soil

A) Apical meristem
B) Lateral meristem
C) Parenchyma
D) Sclerenchyma

A) Meristematic cells are dead; permanent tissue cells are always living
B) Meristematic cells divide actively; permanent tissue cells generally do not divide
C) Meristematic cells have thick walls; permanent tissue cells always lack walls
D) Meristematic cells contain no cytoplasm at all; permanent tissue cells are empty

A) Parenchyma
B) Collenchyma
C) Sclerenchyma
D) Xylem

A) Rigid support in old parts
B) Flexible support in young stems and petioles
C) Transport of water and minerals
D) Storage of fats in seeds

A) Cells are living with thin walls
B) Cells are dead with thick, lignified walls
C) Cells are always green and photosynthetic
D) Cells store starch in large vacuoles only

A) Tracheids
B) Vessels
C) Sieve tubes
D) Xylem parenchyma

A) Xylem
B) Phloem
C) Sclerenchyma
D) Epidermis

A) Tips of roots only
B) Tips of leaves only
C) Base of leaves or internodes, especially in grasses
D) Centre of fruits only

A) Conduct water
B) Protect internal tissues and reduce water loss
C) Perform active cell division
D) Store large amounts of starch always

A) Parenchyma and collenchyma
B) Xylem and phloem
C) Collenchyma and sclerenchyma
D) Epidermis and cortex

A) Sowing → Storage → Harvesting → Weeding
B) Preparation of soil → Sowing → Manuring → Irrigation → Weeding → Harvesting → Storage
C) Irrigation → Preparation of soil → Weeding → Sowing → Storage
D) Storage → Harvesting → Irrigation → Sowing → Manuring

A) Hot and dry months, March–May
B) Rainy season months, June–July
C) Winter months, December–January
D) Any month, no specific time needed

A) Kharif crop – Wheat
B) Rabi crop – Gram
C) Kharif crop – Mustard
D) Rabi crop – Paddy in rainfed areas only

A) Flood irrigation
B) Drip irrigation
C) Canal irrigation
D) Traditional open well irrigation only

A) Improve soil fertility
B) Compete with crop plants for nutrients and water
C) Help in storage of grains
D) Reduce soil erosion only without any other effect

A) It is prepared in factories only
B) It improves soil texture and adds organic matter
C) It contains only nitrogen but no other nutrients
D) It always pollutes soil and water

A) Seeds are sown at random depths
B) Seeds are placed at proper depth and uniform spacing
C) Seeds are not covered with soil
D) Seeds are always mixed with fertilisers automatically

A) Removing all vegetation from slopes
B) Contour ploughing and terrace farming
C) Flooding the field continuously
D) Sowing seeds at random without bunds

A) Nitrogen
B) Carbon
C) Oxygen
D) Water vapour in air only

A) Cutting standing crop
B) Separating grains from the harvested stalks
C) Removing husk from rice grains
D) Storing grains in sacks or silos

A) Selecting and using high yielding varieties
B) Using seeds from any previous crop without checking
C) Reducing irrigation completely
D) Avoiding all manure and fertiliser use

A) Increasing irrigation water requirement
B) Maintaining soil fertility and reducing pest build-up
C) Increasing number of weeds
D) Fixing only potassium in soil always

A) Growing only one crop in a field
B) Growing two or more crops in the same field at the same time
C) Growing crops in rotation year after year
D) Growing a crop in a mixture of water and soil in pots only

A) Mixed cropping
B) Intercropping
C) Crop rotation
D) Monocropping only

A) Fixing atmospheric nitrogen in root nodules
B) Increasing water absorption by roots
C) Producing more flowers of different colours
D) Killing all soil insects directly

A) Depend only on heavy chemical pesticide use
B) Combine biological, cultural and chemical methods to control pests safely
C) Remove all insects from the field, including useful ones
D) Use only hand picking of insects in all crops

A) Permanent improvement of soil structure
B) Increased soil organic content always
C) Decline in soil health and decrease in yield after some years
D) No change at all in soil conditions

A) Crop density
B) Crop yield
C) Crop duration
D) Crop intensity only

A) Increasing manual labour requirement
B) Completing operations quickly and at proper time
C) Decreasing the speed of sowing and harvesting
D) Reducing the area under cultivation always

A) Using only synthetic chemical fertilisers and pesticides
B) Avoiding all biological methods
C) Using organic manures, biofertilisers and biopesticides for sustainable yield
D) Growing crops without any nutrient supply at all