Biology MCQs

1496 MCQs  — Everyday Science MCQs  (Page 138 of 150)

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In all arthropods,the body is covered with a chittinous cuticle which is secreted by the____________?
A. Endodermis
B. Mesophyll
C. Chitin
D. Epidermis
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Sub- phylum vertebrate is also known as__________?
A. Pisces
B. Craniata
C. Aves
D. Amphibia
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The phylum chrordata comprise about how many species?
A. 25,000
B. 50,000
C. 100,000
D. 10,00,000
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It is stiff rod of special cells surrounded by connecive tissue present in the mid -dorsal region and appears in the embryos of all chordates
A. Placenta
B. Notochord
C. Cranianta
D. Ligule
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They are considered to be the most primitive and are surely the first of the vertebrates?
A. Frogs
B. Reptiles
C. Amphibinas
D. Jawless fishes
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The nephridia of earthworm open into the coelom by_________?
A. Nephrostome
B. Nephridiopore
C. Flame cell
D. Anus
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Nephrostome in earthworm opens in____________?
A. External space
B. Internal body cavity
C. In gut
D. In bladder
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Scolidon or dog fish belong to the group of fishes called__________?
A. Cartilaginous fishes
B. Bony fishes
C. Running fishes
D. Jawless fishes
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Mammalian kidney, under restricted water supply can conserve water by over ________ % reabsorption of glomerular filtrate
A. 80.50%
B. 90.50%
C. 95.50%
D. 99.50%
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Which of the following openings have cilia?
A. Nephrostome
B. Nephridiopore
C. Both of these
D. None of these
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Word of the Day
12 Jul
Obdurate
stubbornly refusing to change one’s opinion or course of action.
ضدی، بدکار، سنگدلی

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