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Sana(Silent Love).. ?? 5 years, 9 months ago
Drift? Boi? 5 years, 9 months ago
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Gagandeep Singh 5 years, 9 months ago
Lucifer ? Morningstar? 5 years, 9 months ago
Gaurav Seth 5 years, 9 months ago
Generally the reaction of a metal with an acid is written as
Metal + acid ------> Metal salt + hydrogen gas
Now this reaction is not true for all the metals. Only those metals which are more reactive than hydrogen will liberate hydrogen from the acid and form the corresponding metal salt. These metals are placed above hydrogen in the reactivity series. As copper is less reactive than hydrogen, therefore it will not liberate hydrogen gas from the acids like HCl, HNO3, H2SO4 etc.
But sulphuric acid is a strong oxidising agent, therefore it will oxidise copper metal to Cu2+ ion. However, no hydrogen gas will be formed, only copper metal will be oxidised here. On the other hand, HCl is not that strong oxidising agent, in fact its use as an oxidising agent is not too well known. Hence it does not react with copper metal at all.
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Gagandeep Singh 5 years, 9 months ago
Yogita Ingle 5 years, 9 months ago
Plant hormones are simple organic substances transported through xylem, phloem or by diffusion. They are produced in one part of the plant and transported to the other. No specific organs are involved in the synthesis of the plant hormones.
Examples: Auxins, cytokinins, ethylene, gibberellins.
Lucifer?? Morningstar?? 5 years, 9 months ago
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Posted by Udit Chauhan 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Amoeba takes in food using temporary finger-like extensions of the cell surface which fuse over the food particle forming a food-vacuole. Inside the food vacuole, complex substances are broken down into simpler ones which then diffuse into the cytoplasm. The remaining undigested material is moved to the surface of the cell and thrown out. The complete phagocytosis process includes intake, digestion , absorption, assimilation, and egestion process.
Posted by Ankita Kumari 5 years, 9 months ago
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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 9 months ago
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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 9 months ago
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Vaibhav (Silent Love)?? Avi 270505??? 5 years, 9 months ago
Vaibhav (Silent Love)?? Avi 270505??? 5 years, 9 months ago
Posted by Vaishnavi Satghare 5 years, 9 months ago
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Yogita Ingle 5 years, 9 months ago
Heterocrine glands are those glands that possess both exocrine ( which release chemical substances through ducts) as well as endocrine parts ( which release chemical substances directly into bloodstream or body parts).
Two examples of heterocrine glands are-
1) Pancreas ( as they perform both exocrine and endocrine function)
They release insulin and glucagon into bloodstream ( endocrine function) and release digestive enzymes through ducts in the digestive tract ( exocrine function).
2) Ovary : It releases steroid hormones ( estrogen and progesteron) into bloodstream and also performs exocrine function by producing ova into duct.
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Yogita Ingle 5 years, 9 months ago
Biological magnification refers to the process of increase in the concentration of a toxic chemical with increasing trophic level in a food chain. Harmful or poisonous substance such as DDT sprinkled to kill pests on plants enter the food chain. The plants absorb these harmful chemicals from soil along with water and minerals. They enter the food chain at producer level and then transfers to the next trophic level. The tertiary consumers get more higher levels of these chemicals.
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