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Minchanka [31]
2 years ago
12

Discuss advantages and disadvantages of genetically modified crops like soya, maize ,and rice

Biology
2 answers:
Vilka [71]2 years ago
7 0
The genetic engineering is one of the great marvels of 21st century human. It allowed for precise control over the genetic changes introduced into an organism. Today, we can incorporate new genes from one species into a completely unrelated species through genetic engineering, optimizing agricultural performance or facilitating the production of valuable pharmaceutical substances. In India, GM plants like GM Cotton, BT Brinjal and GM Mustard are experimented, but the government refused to allow it to be commercialized. Recently, the government of India has examined a proposal on GM mustard seeds despite there being severe opposition to it among environmental activists.
garik1379 [7]2 years ago
4 0

many advantage of genetically modified crops. such as diseases free, increase yield according to own desire, we introduce vit A in Golden rice that is useful , etc

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You have learned that the fusion of egg and sperm produces a zygote. But how does the sperm reach the egg, and how does the zygo
FrozenT [24]

Answer:

Pollen grain lands on stigma

Explanation:

A) Pollen grain lands on stigma

  • pollen tube grows down the style
  • generative cell divides, forming two sperm
  • two sperm are discharged to them female gametophyte
  • sperm fuse with the egg and two polar nuclei
  • zygote forms and divides into a terminal cell and a basal cell
  • cells of embryo differentiate into three tissue types---- seed dries out and becomes dormant.

B)

  1. During pollination, a pollen grain is transferred from an anther to a stigma. Once the pollen grain lands on a suitable stigma, it germinates and forms a pollen tube, a structure that grows down through the style to the ovary.
  2. Once in the pollen tube, the generative cell from the pollen grain divides by mitosis, forming two sperm. The sperm travel down the pollen tube and are discharged into the female gametophyte. In a process called double fertilization, one sperm fertilizes the egg, forming the zygote; the other sperm fuses with two polar nuclei in the female gametophyte, forming a triploid (3n) nucleus. The zygote develops into the plant embryo, and the triploid nucleus divides and gives rise to the endosperm. Double fertilization prevents the waste of the plant's resources by ensuring that the nutrient-rich endosperm only develops if the egg is fertilized.
  3. After double fertilization, the ovule starts to develop into a seed containing the plant embryo. As the embryo develops, the three tissue systems are established, and the cotyledons (seed leaves) form. The seeds of many species dry out as they mature. These dry seeds lie dormant until suitable germination conditions occur.

3 0
3 years ago
Fill in the blank !!!
astraxan [27]
I don’t even know Fr Fr
5 0
2 years ago
21. Ang mga sumusunod ay
liberstina [14]

Answer:

D. Zimbabwe

Explanation:

Dahil hindi siya nabibilang sa kanlurang Africa

7 0
3 years ago
The bacterium Bacillus anthracis, which causes anthrax, has been developed as a biological warfare agent.
Elena-2011 [213]
This statement above is TRUE.
Anthrax is an infection that is caused by the bacteria Bacillus anthracis. The infection is spread by contact with the spores of the bacteria. The bacteria affect the respiratory system and cause the lungs to collapse leading to death.
Some countries have developed anthrax as a weapon of war.
8 0
3 years ago
What is not true about alcohol?
nikklg [1K]

Alcohol gives you energy is not true about alcohol. So, the correct option is (c).

As a depressive, alcohol can upset this equilibrium and have an impact on our emotions, thoughts, and behaviour. This is due in part to neurotransmitters, which are molecules that aid in signal transmission from one brain nerve to another.

Your coordination will be impaired by alcohol since it will require more mental effort to cause your muscles to obey directions. Your brain needs more time to see, comprehend, relate to, and decide how to respond to something when you drink alcohol. Alcohol has an impact on almost every organ system in our body.

Therefore, Alcohol gives you energy is not true about alcohol. So, the correct option is (c).

Learn more about Alcohol here:

brainly.com/question/14229343

#SPJ4

4 0
2 years ago
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