During meiosis I, the chromosomes start pairing at
Options
(a) Leptotene (b) Zygotene (c) Pachytene (d) Diplotene
Correct Answer:
Zygotene
Explanation:
During zygotene, a substage of Prophase I of meiosis I, chromosomes start pairing […]
Cellulose is the major component of cell walls of
Options
(a) Pythium (b) Xanthomonas (c) Pseudomonas (d) Saccharomyces
Correct Answer:
Pythium
Explanation:
Cellulose is a major component of cell wall of Pythium. Pythium is […]
Which one of the following is a vascular cryptogam?
Options
(a) Ginkgo (b) Marchantia (c) Cedrus (d) Equisetum
Correct Answer:
Equisetum
Explanation:
Equisetum is a vascular cryptogams. Equisetum is the only living genus in […]
Product of sexual reproduction generally genetates:
Options
(a) prologned dormancy (b) new genetic combination leading to variation (c) Large biomass (d) Longer viability of seeds
Correct Answer:
new genetic combination leading to variation
Albuminous seeds store their reserve food mainly in
Options
(a) Perisperm (b) Endosperm (c) Cotyledons (d) Hypocotyl
Correct Answer:
Endosperm
Explanation:
Endosperm is the nutritive tissue which provides nourishment to the embryo in […]
Which one of the following has haplontic life cycle?
Options
(a) Polytrichum (b) Ustilago (c) Wheat (d) Funaria
Correct Answer:
Ustilago
Explanation:
Ustilago has a haplontic life cycle. This is a simplest and most […]
One of the representatives of phylum Arthropoda is :
Options
(a) Silverfish (b) Pufferfish (c) Flying fish (d) Cuttlefish
Correct Answer:
Silverfish
Explanation:
Representive of Phylum Arthropoda is silverfish. Arthropoda is the largest phylum […]
Interfascicular cambium develops from the cells of :
Options
(a) Xylem parenchyma (b) Endomermis (c) Pericycle (d) Medullary rays
Correct Answer:
Medullary rays
Explanation:
At the time of secondary growth interfascicular cambium is […]
According to Darwin, The organic evolution is due to
Options
(a) Interspecific competition (b) Competition within closely related species (c) Reduced feeding efficiency in one species (d) Intraspecific competition
Correct Answer:
Intraspecific competition
A competitive inhibitor of succinic dehydrogenase is
Options
(a) Malonate (b) Oxaloacetate (c) m-ketoglutarate (d) Malate
Correct Answer:
Malonate
Explanation:
Malonate is a powerful inhibitor of cellular respiration, because it binds to the active […]
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