MORPHOLOGICAL AND INTERNAL STRUCTURE

21. Orange color of corrot is due to any one of the following- [S.S.C Online CHSL (T-I) 18.01.2017 (Shift-III)]

(a) It grows in soil.
(b) Carotene
(c) It does not come in contact with sunlight
(d) The whole plant is orange in colour.

Correct Answer: (b) Carotene

Solution:Carotene:
A yellow, orange, and red pigment found in many plants, especially carrots, and converted to vitamin A in the liver. It is responsible for the characteristic orange color of carrots.

22. Which of the following is a part of a leaf? [S.S.C. Online M.T.S. (T-I) 14.10.2021 (Shift-I)]

(a) Pistil
(b) Stamen
(c) Petiole
(d) Sepal

Correct Answer: (c) Petiole

Solution:The part of the leaves that connects them to the twig or stem is called the Petiole. The gypsum, petals, and stamens are the parts of the flower.

23. Which of the following pigments causes the red colour in onions? [S.S.C. Online C.H.S.L (T-I) 12.08. 2021 (Shift-II)]

(a) Anthocyanins
(b) Carotenoids
(c) Betalains
(d) Chlorophylls

Correct Answer: (a) Anthocyanins

Solution:Anthocyanins:
Water-soluble vacuolar pigments that may appear red, purple, or blue depending on the pH. They are responsible for the red and purple colors in various plants, including red onions.

24. ______ is the pattern of veins in the blade of a leaf. [S.S.C. Online Graduate Level (T-I) 18.08.2021 (Shift-III)]

(a) Anthology
(b) Morphology
(c) Venation
(d) Cytology

Correct Answer: (c) Venation

Solution:Venation:
The arrangement of veins in a leaf blade. This pattern can be reticulate (net-like) or parallel.

25. What is the broad, green part of a leaf called? [S.S.C. Online MTS (T-I) 14.10.2017 (Shift-II)]

(a) Base
(b) Top
(c) Petiole
(d) Lamina

Correct Answer: (d) Lamina

Solution:Lamina:
Also known as the leaf blade, it is the broad, flattened, green part of a leaf that is primarily responsible for photosynthesis.

26. In which type of venation is the design net-like on both sides of the mid-rib? [S.S.C. Online MTS (T-1) 3.10.2017 (Shift-II)]

(a) Reticulate Venation
(b) Parallel Venation
(c) Transpiration
(d) None of these

Correct Answer: (a) Reticulate Venation

Solution:The pattern of veins in the leaves is called Venation. If the veins are arranged in a net-like design or pattern On either side of the mid-rib of the leaves, then it is called Reticulate Venation. This type of configuration is found in the leaves of the hibiscus and mango.

27. What is the thick vein in the middle of the leaf called? [S.S.C. Online MTS (T-1) 18.09.2017 (Shift-III)]

(a) middle vein
(b) venation
(c) reticulated
(d) Parallel venation

Correct Answer: (a) middle vein

Solution:Midrib: The central, prominent vein running through the middle of a leaf, from which smaller veins branch off. The middle vein (which is the same as midrib).

28. Exchange of gases occurs through which part of the plant tissue? [S.S.C. Online MTS (T-I) 19.08.2019 (Shift-I)]

(a) Midrib
(b) Stomata
(c) Reticulate
(d) Xylem

Correct Answer: (b) Stomata

Solution:Stomata:
Small pores, typically on the underside of leaves, that are flanked by guard cells. They facilitate the exchange of gases (carbon dioxide in, oxygen out) and water vapor (transpiration) between the plant and the atmosphere.

29. Plants with green and soft stems are called _____ . [S.S.C. Online MTS (T-I) 20.09.2017 (Shift-I)]

(a) herbs
(b) shrubs
(c) Trees
(d) none of the above

Correct Answer: (a) herbs

Solution:Herbs:
Plants with non-woody, soft, and usually green stems that typically die back to the ground at the end of the growing season.

30. Plants with weak stems, which cannot stand upright and spread on the ground, are called ____ . [S.S.C. Online MTS (T-1) 21.09.2017 (Shift-II)]

(a) creeper
(b) tree
(c) shrubs
(d) herb

Correct Answer: (a) creeper

Solution:Plants with weak stems, which cannot stand upright on the ground but grow by spreading on the ground surface, are called creepers. For example, the vines or vines of pumpkin, watermelon, cucumber, cucumber, etc., are spread on the ground.