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Placenta is the structure formed
by uterine only
by the union of foetal and uterine tissue
by foetus only
by fusion of germ layers
Answer with explanation
Answer: Option BExplanation
The placenta functions as a fetomaternal organ with two components: the fetal placenta (Chorion frondosum), which develops from the same blastocyst that forms the fetus, and the maternal placenta(Decidua basalis), which develops from the maternal uterine tissue.
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Among the biotic components of the ecosystem, the producer system is ?
Animals
Green Plants
Rivers
Sea
Answer with explanation
Answer: Option BExplanation
Green Plants- Producers, consumers, and decomposers are the three broad categories of biotic components. Producers are the plants in the ecosystem, which can generate their own energy requirement through photosynthesis, in the presence of sunlight and chlorophyll.
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A baby blue whale drinks this many liter of milk per day
10
50
110
190
Answer with explanation
Answer: Option DExplanation
190A baby blue whale drinks approximately 190 liters of milk each day. this many liter, a baby tiger drinks only about a liter of milk per day
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Scientist have found that the violent flares from the host stars might affect the nearby planets by affecting the _________.
magnetic field
gravity
atmosphere
mass of the planet
Answer with explanation
Answer: Option CExplanation
Scientists using NASA’s Hubble Space Telescope found that violent flares from the host star may make planets orbiting it uninhabitable by affecting their atmospheres.
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When we see an object, the image formed on the retina is ________.
Real and inverted
Real and erect
Virtual and erect
Virtual and inverted
Answer with explanation
Answer: Option AExplanation
An image is formed on the retina by successive refractions at the cornea, the aqueous humour, lens and vitreous humour. A real diminished and inverted image of the object is formed on the retina. The image formed on the retina is carried to the brain by the optic nerve in the form of electrical signals. The brain interpret these signals and processes the information such that we see the objects erect.
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Which cells in pancreas produce Insulin ?
Thymus
Estrogen
Corpus epididymis
Islets of Langerhans
Answer with explanation
Answer: Option DExplanation
Pancreatic islets, also called islets of Langerhans, are tiny clusters of cells scattered throughout the pancreas. It contain several types of cells, including beta cells, that produce the hormone insulin.
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Which of the following is the treatment of water pollution?
Bag house filter
Windrow composting
Venturi scrubber
Reverse Osmosis
Answer with explanation
Answer: Option DExplanation
Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.
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Right part of the human heart contains ________?
Oxygenated blood
Deoxygenated blood
Both a and b
None of these
Answer with explanation
Answer: Option BExplanation
Deoxygenated blood- The adult human heart consists of two separated pumps, the right side (right atrium and ventricle,) which pumps deoxygenated blood into the pulmonary circulation, and the left side (left atrium and ventricle), which pumps oxygenated blood into the systemic circulation.
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The disease caused by deficiency of protein in children is called?
Marasmus
Scurvy
Beri Beri
Anaemia
Answer with explanation
Answer: Option AExplanation
Scurvy – Vitamin C deficiency
Beri Beri – Vitamin B1 deficiency
Anaemia – Iron deficiency
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Which compound is used in antimalarial drug?
Antalgin
Sulfadiazine
Chloroform
Chloroquin
Answer with explanation
Answer: Option DExplanation
Chloroquin- Chloroquine/proguanil or sulfa drug-pyrimethamine combinations should be used in all other plasmodia infections. The major commercial manufacturer of mefloquine-based malaria treatment is Roche Pharmaceuticals, which markets the drug under the trade name “Lariam”.
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Which one of the following vitamins helps in the formation of collagen?
Vitamin D
Vitamin C
Vitamin E
Vitamin A
Answer with explanation
Answer: Option BExplanation
Vitamin C does a lot of good things for the body. It prevents diseases like scurvy, can lower the risk of certain forms of heart disease, and it’s beneficial to people with anemia and iron deficiency. But perhaps one of its most important functions is its role in the production of collagen.
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Which state government has sought revival of cheetah reintroduction project?
Gujarat
Assam
Odisha
Madhya Pradesh
Answer with explanation
Answer: Option DExplanation
The Madhya Pradesh forest department has written to the National Tiger Conservation Authority (NTCA) to revive the plan to reintroduce cheetahs in the state’s Nauradehi Wildlife Sanctuary. The ambitious project, conceived in 2009, had hit a roadblock due to the need of funds. The country’s last spotted feline died in Chhattisgarh in 1947. Later, the cheetah, which is the fastest land animal, was declared extinct in India in 1952.
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The International team of scientists has recently cracked the genetic code of which cultivated crop for the first time?
Maize
Rice
Pulses
Wheat
Answer with explanation
Answer: Option DExplanation
For the first time, the International team of scientists including 18 from India cracked the genetic code of wheat, the world’s most widely cultivated crop. The information generated will help to identify genes controlling complex agronomic traits such as yield, grain quality, resistance to diseases and pests, as well as tolerance to drought, heat, water logging and salinity. The research, which is published in Journal ‘Science’, stated that the DNA sequence of bread wheat has been ordered and it represents the highest quality genome sequence generated to date. The reference genome covers 94% (14.5 Gb) of the entire wheat genome. The bread wheat has a complex hexaploid genome which is 40 times larger than that of the rice genome and 5 times larger than the human genome. The availability of high-quality reference genome would accelerate the breeding of climate-resilient wheat varieties to feed the ever-increasing world population and help address global food security in the decades to come.
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Which Ebola Virus among the followings doesn’t cause disease in human primates?
Sudan virus
Taï Forest virus
Bundibugyo virus
Reston virus
Answer with explanation
Answer: Option DExplanation
Ebola Virus Disease (EVD) is a rare and deadly disease most commonly affecting people and nonhuman primates (monkeys, gorillas, and chimpanzees). It is caused by an infection with one of five known Ebola virus species, four of which can cause disease in people: Ebola virus (Zaire ebolavirus) Sudan virus (Sudan ebolavirus) Taï Forest virus (Taï Forest ebolavirus) Bundibugyo virus (Bundibugyo ebolavirus) Reston virus (Reston ebolavirus) – known to cause disease in nonhuman primates and pigs, but not in people.
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‘Taxol’ which is obtained from the bark of Pacific yew tree is used to treat which of the following disease?
Parkinson’s
Diabetics
Cancer
Malaria
Answer with explanation
Answer: Option CExplanation
Taxol is a plant alkaloid used in the treatment of breast, ovarian, lung, bladder, prostate, melanoma. esophageal, as well as other types of Solid tumor cancers and Kaposi’s sarcoma.
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First kidney transplantation was performed by
Charles Hufnagel
Charles Elton
Charles Darwin
Mendel
Answer with explanation
Answer: Option AExplanation
Charles Hufnagel- In 1939, the first transplantation from a deceased human donor was done by the Russion Yurii Voronoy, the patient survived for only a couple of days, and the organ never worked. In 1953, the first temporarily successful transplantation of a humankidney was performed by Jean Hamburger in Paris.
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Mangrove trees respire with their
Lungs
Stomata
Aerial roots
Leaves
Answer with explanation
Answer: Option CExplanation
Aerial roots- Mangrove trees live on tropical coasts around the world. Although they are land plants, they grow in saltwater and their roots are buried in thick mud that contains little oxygen. … When the tide is out, these spikes can exchange oxygen and expel carbon dioxide into the air.
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Reverse Peristalsis occurs in the following
Tiger
Squirrel
Cow
Cat
Answer with explanation
Answer: Option CExplanation
Retroperistalsis is the reverse of the involuntary smooth muscle contractions ofperistalsis. It usually occurs as a precursor to vomiting. Local irritation of the stomach, such as bacteria or food poisoning, activates the emetic center of the brain which in turn signals an imminent vomiting reflex.
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The pH condition of saliva
Alkaline
Acidic
Neutral
All above
Answer with explanation
Answer: Option AExplanation
Alkaline- Saliva has a pH normal range of 6.2-7.6 with 6.7 being the average pH. Resting pHof mouth does not fall below 6.3. In the oral cavity, the pH is maintained near neutrality (6.7-7.3) by saliva.
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Substance which is used as medicine for snake bite?
Cobalamin
Quinine
Reserpine
Morphine
Answer with explanation
Answer: Option CExplanation
Reserpine, the purified alkaloid of Rauwolfia serpentina, was the first potent drug widely used in the long-term treatment of hypertension. Rauwolfia serpentina is a tropical woody plant of the Apocyanaceae family ingenious to Asia, South America, and Africa. Extracts of its different parts and of plants resembling rauwolfia were used in Hindu medicine for snakebite, insomnia, insanity and many other diseases and complaints
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Deficiency of Folic acid causes
Rickets
Glossitis
Pellagra
Anemia
Answer with explanation
Answer: Option DExplanation
Diet. A diet low in fresh fruits, vegetables, and fortified cereals is the main cause of folate deficiency. …
Disease. Diseases that affect absorption in the gastrointestinal tract can cause folate deficiencies. …
Genetics, Anemia …
Medication side effects. …
Excessive alcohol intake.
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The chambers in human heart ………
1 auricle, 1 ventricle
2 auricles, 1 ventricle
1 auricle, 3 ventricles
2 auricles, 2 ventricles
Answer with explanation
Answer: Option DExplanation
2 auricles, 2 ventricles- The heart has four chambers: The right atrium receives blood from the veins and pumps it to the right ventricle. … The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. The left ventricle (the strongest chamber) pumps oxygen-rich blood to the rest of the body.
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Thyroxin is responsible for
Stimulates testes
Metabolic activity
Growth of bone
None of them
Answer with explanation
Answer: Option BExplanation
Metabolic activity- Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones.
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Blood is a which type of tissue?
Epithelial
Reproductive
Connective
Muscular
Answer with explanation
Answer: Option CExplanation
Blood is considered a connective tissue because it has a matrix. The living cell types are red blood cells, also called erythrocytes, and white blood cells, also called leukocytes. The fluid portion of whole blood, its matrix, is commonly called plasma.
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