[B] It reacts with cold water to form magnesium oxide and evolves hydrogen gas. Magnesium metal never reacts with cold water but reacts with both hot water and steam to form magnesium hydroxide and hydrogen gas. Mg(s) + H₂O(l) → Mg(OH)₂ + H₂(g) ↑
[B] It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
Magnesium metal never reacts with cold water but reacts with both hot water and steam to form magnesium hydroxide and hydrogen gas.
Mg(s) + H₂O(l) → Mg(OH)₂ + H₂(g) ↑
Some possible explanations are that the alien species may be i. Vigorously growing and compete with the natural plants for minerals, water etc. The less vigorous local species may be eliminated. ii. Natural pests and predators of the alien species may not be present in the introduced area-leading toRead more
Some possible explanations are that the alien species may be
i. Vigorously growing and compete with the natural plants for minerals, water etc. The less vigorous local species may be eliminated.
ii. Natural pests and predators of the alien species may not be present in the introduced area-leading to proliferation in their number.
iii. The introduced species may harm the local species by production of chemicals (Amensalism)
iv. The alien species by proliferation may make conditions unfavourable for the growth of local native plants. (eg. Eichornia).
i. Restriction endonucleases: for cutting the desired DNA at desired places ii. Gel electrophoresis: for separating the desired DNA fragments iii. Ligase enzyme: for creating recombinant DNA molecule. iv. DNA delivery system: like electroporation, microinjection, gene gun method. v. Competant host (Read more
i. Restriction endonucleases: for cutting the desired DNA at desired places
ii. Gel electrophoresis: for separating the desired DNA fragments
iii. Ligase enzyme: for creating recombinant DNA molecule.
iv. DNA delivery system: like electroporation, microinjection, gene gun method.
v. Competant host (usually bacteria / yeast): to take up recombinant DNA.
Biological control means life against life. It’s a natural and ecofriendly concept. It employs the natural organisms to control the population of pathogens and pests in an ecosystem. Classical examples are Trichoderma which is antagonist against many soil borne plant pathogens. Similarly, PenicilliuRead more
Biological control means life against life. It’s a natural and ecofriendly concept. It employs the natural organisms to control the population of pathogens and pests in an ecosystem. Classical examples are Trichoderma which is antagonist against many soil borne plant pathogens. Similarly, Penicillium inhibits the growth of Staphylococcus and therefore has been successfully used in the production of Penicillin antibiotic to control many human bacterial pathogens.
Each species has a specific position or functional role within the community, called niche. According to the Gausses principle, no two species can live in the same niche. In this case, two herbivorous species are living in the same niche and feeding on phytoplanktons. It may be because of the availaRead more
Each species has a specific position or functional role within the community, called niche. According to the Gausses principle, no two species can live in the same niche. In this case, two herbivorous species are living in the same niche and feeding on phytoplanktons. It may be because of the availability of sufficient phytoplanktons/and or less number of individuals of the fish species. of the two species might have occured. And though neither of the species have been eliminated, niche overlapping may effect the growth and development of individuals of the species.
Which among the following statements is incorrect for magnesium metal ?
[B] It reacts with cold water to form magnesium oxide and evolves hydrogen gas. Magnesium metal never reacts with cold water but reacts with both hot water and steam to form magnesium hydroxide and hydrogen gas. Mg(s) + H₂O(l) → Mg(OH)₂ + H₂(g) ↑
[B] It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
See lessMagnesium metal never reacts with cold water but reacts with both hot water and steam to form magnesium hydroxide and hydrogen gas.
Mg(s) + H₂O(l) → Mg(OH)₂ + H₂(g) ↑
Elaborate how invasion by an alien species reduces the species diversity of an area.
Some possible explanations are that the alien species may be i. Vigorously growing and compete with the natural plants for minerals, water etc. The less vigorous local species may be eliminated. ii. Natural pests and predators of the alien species may not be present in the introduced area-leading toRead more
Some possible explanations are that the alien species may be
See lessi. Vigorously growing and compete with the natural plants for minerals, water etc. The less vigorous local species may be eliminated.
ii. Natural pests and predators of the alien species may not be present in the introduced area-leading to proliferation in their number.
iii. The introduced species may harm the local species by production of chemicals (Amensalism)
iv. The alien species by proliferation may make conditions unfavourable for the growth of local native plants. (eg. Eichornia).
Name the five key tools for accomplishing the tasks of recombinant DNA technology. Also mention the functions of each tool.
i. Restriction endonucleases: for cutting the desired DNA at desired places ii. Gel electrophoresis: for separating the desired DNA fragments iii. Ligase enzyme: for creating recombinant DNA molecule. iv. DNA delivery system: like electroporation, microinjection, gene gun method. v. Competant host (Read more
i. Restriction endonucleases: for cutting the desired DNA at desired places
See lessii. Gel electrophoresis: for separating the desired DNA fragments
iii. Ligase enzyme: for creating recombinant DNA molecule.
iv. DNA delivery system: like electroporation, microinjection, gene gun method.
v. Competant host (usually bacteria / yeast): to take up recombinant DNA.
Describe critically the main ideas behind the biological control of pests and diseases.
Biological control means life against life. It’s a natural and ecofriendly concept. It employs the natural organisms to control the population of pathogens and pests in an ecosystem. Classical examples are Trichoderma which is antagonist against many soil borne plant pathogens. Similarly, PenicilliuRead more
Biological control means life against life. It’s a natural and ecofriendly concept. It employs the natural organisms to control the population of pathogens and pests in an ecosystem. Classical examples are Trichoderma which is antagonist against many soil borne plant pathogens. Similarly, Penicillium inhibits the growth of Staphylococcus and therefore has been successfully used in the production of Penicillin antibiotic to control many human bacterial pathogens.
See lessIn an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons. As per the Gausses principle, one of the species is to be eliminated in due course of time, but both are surviving. How? And what possibly happened to both the species?
Each species has a specific position or functional role within the community, called niche. According to the Gausses principle, no two species can live in the same niche. In this case, two herbivorous species are living in the same niche and feeding on phytoplanktons. It may be because of the availaRead more
Each species has a specific position or functional role within the community, called niche. According to the Gausses principle, no two species can live in the same niche. In this case, two herbivorous species are living in the same niche and feeding on phytoplanktons. It may be because of the availability of sufficient phytoplanktons/and or less number of individuals of the fish species. of the two species might have occured. And though neither of the species have been eliminated, niche overlapping may effect the growth and development of individuals of the species.
See less