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A Learning Portal from Recruitment India
A Learning Portal from Recruitment India
The correct sequence of plants in a hydrosere is
Pistia → Volvox → Scirpus → Hydrilla → Oak → Lantana
Oak → Lantana → Scirpus → Pistia → Hydrilla → Volvox
Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
Oak → Lantana → Volvox → Hydrilla → Pistia → Scirpus
Answer with explanation
Answer: Option CExplanation
Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
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What is the use of Lichens?
Source of wood
Initial vegetation for wastelands
Bio-indicator for water and air pollution
To check the air pollution
Answer with explanation
Answer: Option CExplanation
Lichens perform useful functions in nature. They provide shelter for other organisms. They also provide food for animals and materials that they can use to build their homes or nests. When lichens grow on rocks, the chemicals that they release contribute to the slow process of rock breakdown and soil formation.
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The troposphere layer keeps us “not too hot in the summer” and “not too cold in the winter.” How do scientists call this effect?
Greenhouse Effect
Seasonal Effect
Ozone Layer Depletion Effect
Deforestation Effect
Answer with explanation
Answer: Option AExplanation
This important process warms the troposphere and causes the greenhouse effect – without which Earth would be freezing rock. So radiating the heat back to Earth keeps the planet warm enough to support life – not too hot in the summer and not too cold in the winter. … This warming effect is called global warming.
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Rays emitted by radioactivity are
X-rays
Microwaves
Gama rays
Infrared rays
Answer with explanation
Answer: Option CExplanation
Gama rays- There are two general types of radiation emitted: particulate and electromagnetic (EM). The EM radiation is emitted as a photon (think particle of light). The particulate radiations are subatomic particles and smaller nuclides, depending on theradioactive decay (transition) type.
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What is the name of the antibiotics discovered from Soil recently?
Neo-Fradin
Malacidins
Kanamycin
Amikacin
Answer with explanation
Answer: Option BExplanation
NIH-funded researchers discovered a new class of antibiotics, called malacidins, by analyzing the DNA of the bacteria living in more than 2,000 soil samples
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What is the name of the “new organ” discovered by researchers recently?
Gallarium
Photophore
Interstitium
Irisin
Answer with explanation
Answer: Option CExplanation
Scientists have identified a new human organ hiding in plain sight, in a discovery they hope could help them understand the spread of cancer within the body. Layers long thought to be dense, connective tissue are actually a series of fluid-filled compartments researchers have termed the “interstitium”.
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How do you call the condition in which an individual’s emotional state is at an extreme and is joined with cognition?
Glossophobia
Proxemics
Paranoia
Stage phobia
Answer with explanation
Answer: Option CExplanation
Paranoia- Factitious disorder imposed on self (formerly known as Munchausen syndrome) is amental illness, in which a person repeatedly acts as if he or she has a physical,emotional or cognitive disorder when, in truth, he or she has caused the symptoms.
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Which crop helps in nitrogen fixation?
Potatoes
Maize
Rice
Beans
Answer with explanation
Answer: Option DExplanation
Nitrogen–fixing crops. Plants that contribute to nitrogen fixation include the legume family – Fabaceae – with taxa such as clover, soybeans, alfalfa, lupins, peanuts, and rooibos.
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Vitamin B7 is called
Biotin
Pantothenic acid
Ratinol
Folic acid
Answer with explanation
Answer: Option AExplanation
Vitamin B7, also called biotin, is a vital part of a healthy metabolism and creating important enzymes. Biotin is often used to strengthen hair and nails, and is alsocalled Vitamin H (for hair).
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Vitamin B1 is called
Thiamine
Pyridoxin
Rationol
Niacin
Answer with explanation
Answer: Option AExplanation
Thiamine is a vitamin, also called vitamin B1. … It is often used in combination with other B vitamins, and found in many vitamin B complex products.
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The causal organism for African sleeping sickness i is
T. tangela
T. gambiense.
T. rhodesiense
Trypanosoma cruzi
Answer with explanation
Answer: Option BExplanation
Trypanosoma gambiense was first observed by Forde in 1901. It causes African sleeping sickness. The disease, also called trypanosomiasis, is found in western and central parts of Africa. The parasite is transmitted by blood-sucking tse-tse fly, Glossina palpalis. Mouth and contractile vacuole are absent. Food is absorbed through the body surface.
The parasite multiplies by fission. In human beings, the parasite lives in the blood plasma. It causes Trypanosoma fever. It is accompanied by glandular swelling. Later the parasite enters the cerebrospinal fluid and damages the brain. It makes the patient lethargic and unconscious. Because of it, the disease is called sleeping sickness. If untreated, the disease leads to death.
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The number of Mitochondria in bacteria cell is
Four
Zero
Two
One
Answer with explanation
Answer: Option DExplanation
Mitochondria vary in number and location according to cell type. A single mitochondrion is often found in unicellular organisms. Conversely, the chondriome size of human liver cells is large, with about 1000–2000 mitochondria per cell, making up 1/5 of the cell volume
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Which acid is also known as the king of the acids?
Acetic acid
Sulphuric Acid
Citric Acid
Hydrochloric acid
Answer with explanation
Answer: Option BExplanation
Sulphuric Acid- It is so important, that at one time the annual production of sulphuric acid was taken as a measure of the degree of industrialisation of a country, and earned it its nickname of the ‘king of chemicals’. Sulphuric acid is familiar to us as the electrolyte in the lead acid batteries in automobiles.
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