1. Ripening of fruits is because of which among the following plant hormones?
[A] Auxin
[B] Ethylene
[C] Gibberellins
[D] Carins
Show Answer
Correct Answer: B [Ethylene]
Notes:
Ripening is a process in fruits that causes them to become more palatable. Most fruits produce a gaseous compound called ethylene that starts the ripening process. Ethylene Gas Can be Used to Regulate Fruit Ripening.
2. Polycythaemia is a disease related to _______?
[A] Red Blood Cells
[B] White Blood Cells
[C] Blood Serum
[D] None of the above
Show Answer
Correct Answer: A [Red Blood Cells]
Notes:
Polycythaemia is a disease related to Red Blood Cells. It refers to an increase in the number of red blood cells in the body which cause the blood to be thicker, and this, in turn, increases the risk of other health issues, such as blood clots.
3. The pitcher plant is characterized by which of the following plants ?
[A] Autotrophes
[B] Insectivorous
[C] Allergen
[D] None of the above
Show Answer
Correct Answer: B [Insectivorous]
Notes:
The pitcher plant is characterized as insectivorous. Pitcher plants are several different carnivorous plants. They have modified leaves known as pitfall traps which is a prey-trapping mechanism featuring a deep cavity filled with digestive liquid.
4. Which among the following disease has the minimum incubation period, comparing to other ones?
[A] Small Pox
[B] Influenza
[C] Measles
[D] Mumps
Show Answer
Correct Answer: B [Influenza]
Notes:
Influenza (1-2 days) , rest are 6-15 days
5. Which among the following sets of fauna represents same taxonomical order?
[A] Whales, Dolphins, Porpoises
[B] Dolphins, Porpoises, Dugong
[C] Whale, Dugong, Porpoises
[D] Dolphins, Dugong, Manatees
Show Answer
Correct Answer: A [ Whales, Dolphins, Porpoises ]
Notes:
Marine mammals are a diverse group of animals. They include cetaceans (whales, dolphins, and porpoises), sirenians (manatees and dugong), pinnipeds (true seals, eared seals and walrus), a few otters (the sea otter and marine otter) and the polar bear (usually grouped with the marine mammals).
6. Which among the following is most distantly related to other three animals?
[A] Walrus
[B] Sea Lion
[C] Seals
[D] Sperm whale
Show Answer
Correct Answer: D [ Sperm whale]
Notes:
Seals, Walruses and Sea lions are Mammals belonging to a single taxonomic group ( a clade) called Pinnipedia, which means fin footed. All of them are semi-aquatic marine mammals. They belong to the order Carnivora and their closest living relatives are bears. They are characterized by modification of limbs to flippers. Pinnipeds are mammals with four flippers — one pair in front and one at the back. They are warm-blooded, nurse their young, breathe air and have hair. The sea lion has small, tiny external ear flaps. Seals have no flaps. The front flippers of sea lions are long, have no hair and nails. Seals’ front flippers are short, blunt, covered with hair with nails on the ends. Sea lions can turn their hind flippers forward to move on land but seals cannot do so.
7. Which one of the following is a useful functional association between fungi and the roots of higher plants?
[A] Mycorrhyza
[B] Lichen
[C] Root Nodules
[D] Cluster roots
Show Answer
Correct Answer: A [ Mycorrhyza]
Notes:
A Mycorrhyza is a composite organism consisting of a fungus (the mycobiont) and a photosynthetic partner (the photobiont or phycobiont) growing together in a symbiotic relationship.
8. Which among the following is also called as ‘power house of the cell’?
[A] Cell wall
[B] Mitochondria
[C] Golgi bodies
[D] Plastids
Show Answer
Correct Answer: B [Mitochondria]
Notes:
Mitochondria is known as the Powerhouse of the Cell as it plays host to one of the most important processes in your body: cellular respiration. Taking in glucose and oxygen, mitochondria produce energy, which they capture and package as energy-rich molecules of ATP.
9. Which of the following is the reason behind when one enters a dark room; he is not able to see anything but after some time his vision improves? (UPSC Prelims 1983)
[A] The retina of the eye comes forward
[B] The retina of the eye moves backward
[C] The pupil of the eye contracts
[D] The pupil of the eye dilates
Show Answer
Correct Answer: D [The pupil of the eye dilates]
Notes:
Our eyes cannot see everything clearly when we enter a dark room from a bright light. This is due to the reason that in dark room the pupil is large so when we come out in bright light, a large amount of light enters our eyes and we feel glare.
10. The highest fat content is found in the milk of which of the following animals? (UPSC Prelims 1991)
[A] Buffalo
[B] Cow
[C] Camel
[D] Reindeer
Show Answer
Correct Answer: A [Buffalo]
Notes:
Buffalo milk has the highest fat content, which is on average twice as high as that of cow milk. The fat-to-protein ratio in buffalo milk is about 2:1.
