AJKPSC ALL MCQS 2024
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چار آپشن میں سے کسی ایک پر کلک کرنے سے جواب سرخ ہو جائے گا۔
Fern
Moss
Pine tree
Sunflower
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Explanation
Bryophytes such as mosses and algae are non-vascular plants.
They do not possess true roots, stems and leaves.
Xylem and phloem are absent. Bryophytes include liverworts, hornworts and mosses.
Chlorophyll a.
Xanthophyll
Carotenoid
Anthocyanin
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Explanation
Autumn leaves appear red and yellow because carotenoids are revealed .
This happens when chlorophyll breaks down in response to less sunlight.
Shown is a colour photograph of bright red and yellow flowers with green stems and leaves.
Capillary action
Transpiration
Active transport
osmosis
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Explanation
Transpiration is ultimately the main driver of water movement in xylem, combined with the effects of capillary action.
The cohesion-tension model works like this: Transpiration (evaporation) occurs because stomata in the leaves are open to allow gas exchange for photosynthesis.
Collenchyma
Parenchyma
Sclerenchyma
Xylem
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Explanation
The living simple tissue that provides support to the growing parts of a plant is collenchyma .
Collenchyma is a simple permanent tissue .
The cells are thickened at the corners due to the deposition of cellulose, hemicellulose, and pectin.
It provides mechanical support to the young, growing parts of the plant.
Taxonomy
Biodiversity.
Systematics
All of these
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Explanation
The branch of botany that deals with the classification and evolutionary study of plants is called Systematics, which includes Plant Taxonomy,
Stomata
Wounds
Root hairs
Leaf cuticles
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Explanation
During infection, fungi typically penetrate plant tissues through Stomata
Fungi often enter plant tissues through natural openings like stomata, which are small pores on the surface of leaves.
Dominance
Epistasis
Multiple allele
Incomplete dominance
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Explanation
In the ABO blood group system, there are three alleles (IA, IB, and i) that determine the blood type.
These alleles interact to produce four possible blood types : A, B, AB, and O.
Multiple alleles refer to a situation where more than two alternative forms (alleles) of a gene are present in a population , as seen in the ABO blood group system.
Prolactin harmone of mammary gland
Growth hormone of adenohypophysis
Luteinizing hormone of pituitary gland
Thyroid stimulating hormone of thyroid
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Explanation
Gigantism and Dwarfism are diseases related to the growth hormone of the adenohypophysis .
Gills
Lungs
Skin
Pores on its anterior end
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Explanation
In earthworms, the skin serves as the organ of respiration.
This type of respiration is called cutaneous respiration.
The skin is thin, transparent, moist and richly supplied with blood capillaries.
Pelecypoda
Mollusca
Cephalopoda
None of these
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Explanation
A cephalopod is any member of the molluscan class Cephalopoda such as a squid, octopus, cuttlefish, or nautilus.
Class: Cephalopoda; Cuvier, 1797
Scientific name: Cephalopoda
Domain: Eukaryota
Kingdom: Animalia