basic fertilizers such as urea(when dissolved in water)
In fertilization, male and female sex cells fuse to form a single cell called a zygote. The zygote grows and develops by mitosis into a fully functioning new individual. There are two mechanisms by which fertilization can take place.
In animals, there are two types of fertilisation, internal and external. Internal fertilisation happens inside the female body. External fertilisation happens outside the female body. Mammals, birds, and reptiles use internal fertilisation .Reproduction of the sea urchin ,fishes , frogs are typical example of external fertilization among aquatic animals.
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What are fertilizers? Classify fertilizers with suitable examples.
Fertilizers are the substances which improve the fertility of soil and help the plants to grow and synthesize more food crops.
Fertilizers are of two types :
• Mineral or chemical fertilizers :-
→ They contain inorganic chemical substances like nitrates, phosphates, potassium etc.
• Biological fertilizers :-
→ They contain organic substances of Biological origin including plants, animals and their residues.
⠀⠀⠀⠀⠀ ⠀⠀нσρє ıт нєłρs
⠀⠀⠀⠀ ⠀⠀⠀ωıтн яєgαя∂s
⠀⠀⠀⠀ ⠀⠀⠀❤αя + ηαѵ❤
development of seed without fertilisation is called apomixis. In this case the unfertilised egg cell gives rise to embryo without fertilisation. In this case an embryo is formed directly from nucellus or integument tissue of ovule. It is a form of asexual reproduction that copies sexual reproduction.
Fertilization in flowering plants happens through a process called pollination. Pollination occurs when pollen grains from the anther land on a stigma. ... Fertilization occurs when one of the sperm cells fuses with the egg inside of an ovule. After fertilization occurs, each ovule develops into a seed.
Parthenocarpy is a phenomenon by which fruits are developed without the process of fertilization. The difference between the fruits developed naturally and through parthenocarpy is that the fruits formed through parthenocarpy are seedless. They are known as seedless or virgin fruits.
ᴀ ᴄʜᴇᴍɪᴄᴀʟ ᴏʀ ɴᴀᴛᴜʀᴀʟ sᴜʙsᴛᴀɴᴄᴇ ᴀᴅᴅᴇᴅ ᴛᴏ sᴏɪʟ ᴏʀ ʟᴀɴᴅ ᴛᴏ ɪɴᴄʀᴇᴀsᴇ ғᴇʀᴛɪʟɪᴛʏ ɪs ᴄᴀʟʟᴇᴅ ғᴇʀᴛɪʟɪᴢᴇʀ
ᴛʜᴇʀᴇ ᴀʀᴇ ᴛʏᴘᴇs ᴏғ ғᴇʀᴛɪʟɪᴢᴇʀs ᴛʜᴇʏ ᴀʀᴇ
ɴᴀᴛᴜʀᴀʟ ғᴇʀᴛɪʟɪᴢᴇʀ ᴀʀᴇ sᴏ ɢᴏᴏᴅ ᴛʜᴀɴ ᴄʜᴇᴍɪᴄᴀʟ ғᴇʀᴛɪʟɪᴢᴇʀs
organic fertilizer comes from an organic source such as manure, blood, meal,cottonseed ,feather meal, crab meal, or others, as opposed to synthetic sources. There are also some natural fertilizers that are not organic,such as Greensand, which contains potassium, iron, calcium, and other nutrients.
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There are two types of fertilizations:
1. External Fertilization as in case of Frogs and other amphibian where fusion of male and female gamete occurs outside the female body.
2. Internal Fertilization where fertilization occurs inside the female body as in case of humans.
For example nitrogen fertilizers,