B. Answer the following questions.
1. What is germination?
2. Explain the structure of a seed with the help of a diagram.
3. Explain germination of a seed with the help of a diagram.
4. Why can't all seeds grow into plants?
5. What is dispersal?
6. How are seeds dispersed by wind, animals and explosion?
7. Name the parts of a plant other than seed which help in reproduction.
anos. Define agriculture and crop.
9. List the points that should be kept in mind while growing a particular crop.
Answers
1) Germination occurs when a spore or seed starts to grow. It is a term used in botany. When a spore or seed germinates, it produces a shoot or seedling, or (in the case of fungi) a hypha. The biology of spores is different from seeds. A spore germinates if and when conditions are right.
2) Internal structure — The seed is covered by a hard, tough covering called testa. Inner to the tests is the embryo. Embryo consists of two cotyledons and embryo axis. ... The plumule is present in between the two cotyledons and its top bears two folded tiny leaves.
3)The Seed Germination Process :
1) Imbibition: water fills the seed.
2) The water activates enzymes that begin the plant's growth.
3) The seed grows a root to access water underground.
4) The seed grows shoots that grow towards the sun.
5) The shoots grow leaves and begin .
4) some seeds might have lost the capability to grow because of dormancy. ✯ some seeds might not find suitable conditions such as warmth. ✯ when we grow seeds we must keep distance between each of them while sowing. if they are not away from each other it would get hard for some of them to grow.
5) the process of sending somebody/something in different directions; the process of spreading something over a wide area.
6) If conditions are right the seed will germinate and grow into a new plant. Some plants distribute their seeds by violently ejecting them so that they fall well away from the parent plant. This is explosive dispersal. ... Seeds dispersed by the wind must be light and small in order to be carried by the wind.
7) Asexual reproduction produces individuals that are genetically identical to the parent plant. Roots such as corms, stem tubers, rhizomes, and stolon undergo vegetative reproduction. Some plants can produce seeds without fertilization via apomixis where the ovule or ovary gives rise to new seeds.
8) A crop is a plant or animal product that can be grown and harvested extensively for profit or subsistence. Crop may refer either to the harvested parts or to the harvest in a more refined state. Most crops are cultivated in agriculture or aquaculture. ... Most crops are harvested as food for humans or fodder for livestock.
9) the soil should be fertile and full of minerals, sunlight, water and contant growing temperature.
Explanation:
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Answer:
ASWAL SIR ki jai
Explanation:
male answer mahit nahi babu mi sa ta answer pahu raharo kiti vela cha
#aswal sir cha shenapat. to all my dear praja