11. Which of the following is the largest invertebrate?
[A] Arthropod
[B] Echinoderm
[C] Mollusc
[D] Sponge
Show Answer
Correct Answer: C [Mollusc]
Notes:
Molluscs, such as squid, cuttlefish and octopus, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species.
12. Which of the following is a non-poisonous snake?
[A] Python
[B] Hognose snake
[C] Garter snake
[D] Ribbon snake
Show Answer
Correct Answer: A [Python]
Notes:
Python is a non-poisonous snake. Pythons are large muscular snakes which grow up to 35 feet and weigh as much as 300 pounds. Pythons are well known for the way they kill their preys by squeezing then to death and then swallowing them all at once.
13. Haemoglobin is an important component of which of the following?
[A] Red blood cells
[B] White blood cells
[C] Plasma
[D] All options are correct
Show Answer
Correct Answer: A [Red blood cells]
Notes:
Hemoglobin is the iron-containing oxygen-transport metalloprotein in the red blood cells of almost all vertebrates as well as the tissues of some invertebrates. Haemoglobin in the blood carries oxygen from the lungs or gills to the rest of the body.
14. Xylem helps in transportation of which of the following?
[A] Food
[B] Water
[C] Both food and water
[D] Nutrients
Show Answer
Correct Answer: B [Water]
Notes:
Xylem is a type of tissue in vascular plants that transports water and some nutrients from the roots to the leaves. Water is passively transported into the roots and then into the xylem. The forces of cohesion and adhesion cause the water molecules to form a column in the xylem.
15. Which of the following correctly define Amniocentesis? (UPSC Prelims 1988)
[A] Determination of foetal sex
[B] Separation of amino acids
[C] Determination of the sequence of amino acids in a protein
[D] Inducing abortion
Show Answer
Correct Answer: A [Determination of foetal sex]
Notes:
Amniocentesis is a medical procedure used primarily in prenatal diagnosis of chromosomal abnormalities and foetal infections, as well as for sex determination.
16. Significantly higher level of urea in the blood is the indication of which of the following damages? (UPSC Prelims 1991)
[A] Liver damage
[B] Kidney damage
[C] Heart attack
[D] Spleen damage
Show Answer
Correct Answer: B [Kidney damage]
Notes:
Generally, a high blood urea nitrogen level means your kidneys aren’t working well. But elevated blood urea nitrogen can also be due to: Urinary tract obstruction, congestive heart failure or recent heart attack.
17. Most gymnosperms are__?
[A] Xerophytic
[B] Hydrophytic
[C] Halophytic
[D] Epiphytic
Show Answer
Correct Answer: A [Xerophytic ]
Notes:
Most gymnosperms are Xerophytic. Gymnosperms are flowerless plants that produce cones and seeds.
18. Bignonia unguiscati is an example of which of the following?
[A] Leaflet Hooks
[B] Leaf Roots
[C] Scale Leaves
[D] Leaf Spines
Show Answer
Correct Answer: A [Leaflet Hooks]
Notes:
Leaflet Hooks is the terminal leaflets of the leaf become modified into hook-like structures that help them to climb. Bignonia unguiscati is an example of this.
19. Which of the following is similar to autogamy, but requires pollinators?
[A] Geitonogamy
[B] Cleistogamy
[C] Apogamy
[D] Xenogamy
Show Answer
Correct Answer: A [Geitonogamy]
Notes:
Geitonogamy is similar to autogamy but requires pollinators. Autogamy is the pollination of a flower by its own pollens. Same geitonogamy is the pollination of one flower by the pollen grains of another flower on the same plant.
20. Radish is an example of which of the following root?
[A] Conical roots
[B] Fusiform roots
[C] Napiform roots
[D] Tuberous roots
Show Answer
Correct Answer: B [Fusiform roots]
Notes:
Radish is an example of Fusiform roots. Fusiform roots swell in the middle and become thinner towards both ends.
