11. What is the famous Bombyx Mori, a variety of?
[A] Honeybee
[B] Cotton
[C] Earthworm
[D] Silk
Show Answer
Correct Answer: D [Silk]
Notes:
Sericulture – It refers to the rearing of silk worms and obtaining silk from them. It involves raising a feed crop, chiefly mulberry leaves, and tending to silk worms and obtaining silk fibre from the cocoons produced by the worms.
Varieties – There are a number of varieties of worm reared for silk production, the most important variety being Bombyx mori.
12. Which of the following statements are correct about Golgi bodies?
[A] Camillo Golgi discovered the Golgi apparatus.
[B] found in the eukaryotic cells
[C] It is a sac-like organelle
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Camillo Golgi discovered Golgi bodies in 1898. Golgi bodies are found in eukaryotic cells and are involved in the packaging of protein and lipid molecules.
13. Which of the following is the function of contractile vacuole?
[A] To carry out pinocytosis
[B] To carry out metabolic process
[C] To pump excess water out of the cell
[D] To carry out phagocytosis
Show Answer
Correct Answer: C [To pump excess water out of the cell]
Notes:
Contractile vacuoles that regulate intracellular water balance by storing and expelling excess water from the cell.
14. What is an enzyme?
[A] Acid
[B] Base
[C] Salt
[D] Catalyst
Show Answer
Correct Answer: D [Catalyst]
Notes:
Enzyme is a protein. It acts as a catalyst in living organisms, and controls the rate of chemical reactions inside the body.
15. Vaucheria and Chara are examples of?
[A] Euglenophyta
[B] Coenocytic
[C] Rhodophyta
[D] None of these
Show Answer
Correct Answer: B [Coenocytic]
Notes:
No septa are found in Vaucheria except in the reproductive stage. Many of its nuclei are moved around which is known as the alga coenocytic thallus.
16. Which of the following is not a characteristic of gymnosperms?
[A] Parallel venation
[B] Perennial plants
[C] Distinct branches
[D] Xylem with vessels
Show Answer
Correct Answer: D [Xylem with vessels]
Notes:
The characteristics of gymnosperms: They do not produce flowers, Seeds are not formed inside a fruit, they are found in colder regions where snowfall occurs, they develop needle-like leaves, they are perennial or woody, forming trees or bushes, they are not differentiated into the ovary, style, and stigma.
17. The stalk becomes flattened, takes the shape of a leaf, and turns green in color, which of the following is it called?
[A] Leaf Spines
[B] Leaflet Hooks
[C] Leaf Roots
[D] Phyllode
Show Answer
Correct Answer: D [Phyllode]
Notes:
The stalk becomes flattened, takes the shape of a leaf, and turns green in color is called Phyllode.
18. Which of the following is a long tube-like slender stalk connecting the stigma and the ovary?
[A] Stigma
[B] Ovary
[C] Style
[D] Pistil
Show Answer
Correct Answer: C [Style]
Notes:
Style is a long tube-like slender stalk connecting the stigma and the ovary.
19. What are the major diseases of wheat?
[A] Powdery mildew
[B] Loose smut
[C] Karnal bunt
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Powdery Mildew, Loose Smut, Brown Rust, Striped Rust/Yellow Rust, Black Rust, Flag Smut, Hill Bunt or Stinking Smut, Karnal Bunt, etc. are the major diseases of wheat.
20. Reptiles have __ kidney.
[A] mesonephric
[B] unipapillary
[C] metanephric
[D] None of these
Show Answer
Correct Answer: C [metanephric]
Notes:
Reptiles have metanephric kidneys. Metanephrics are the functional kidneys of adult amniotes and have separated urinary function from a genital function.
