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function of male flower parts
anther - produces pollen grains use in pollination filament - support to the anther
Functions of all parts of female plant
Stigma - sticky substance receives pollen grain style - Supports stigma ovary - produces egg
seeds can be sown by two ways
manually and using machines called seed drills
They are often brightly colored or unusually shaped to attract pollinators
petals
Anther and stigma is a part of
Anther - male stigma - female
What protects the flower before it blossoms?
sepal
Agents of pollination
wind , water and insect
What is pollination
The process of transfer of pollen grains from anther to the stigma
What makes up the female parts of the flower
style , stigma and ovary
True or False Weedicide and pesticides are natural and free from all chemicals
False
Mention the time period for Rabi crop and examples
Nov - April Beans , pea , barley , oats , gram , wheat , mustard
Why kharif crops are usually sown in beginning of monsoon ? Give examples
It needs plenty of water . cotton , maize , soyabean , sunflower , paddy , maize
Give one way to prevent soil erosion
Reforestation
Cutting, layering, and grafting are examples of
Artifical Vegetative propagation
State True or False if False correct statement Weeds are good for the crops as they provide them all the nutrients
False Unwanted plant growing among crops and compete for water , space , light and nutrients
Name this method
Sprinkler Irrigation method
First step of agriculture
Soil prepartion
advantage of crop rotation
to increase soil fertility
A tuber bud in potato also known as
Eye
Name other parts of plant other than seed capable of growing new plant?
stem , root and leaves
reproduction take place in bryophyllum?
leaves
Name this process of vegetative propagation and examples?
Grafting apple , mango and rose
Define stem - cutting and example
rose , money plant a part of stem containing bud is cut and planted in soil.
How animals can disperse seed?
seeds cling on animal's skin and seeds come out of their bodies in their dropings.
pea , peanut and castor are the example of seed dispersal by
Explosion
What types of seeds are carried by the wind?
very light, wing hairy , seeds with hairy parachutes
Name the agents of seed dispersal
water , wind , animal and explosion.
Function of the seed coat?
To protect the seed from environmental conditions , drying up and attack of fungi.
First part to appear when a seed germinates.
Primary root / radicle
Peas , pulses and beans have _____ cotyledons.
two
Function of micropyle in seed
a tiny opening through which seed can absorb water.