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 […]
During seed germination its stored food is mobilized
Options
(a) Cytokinin (b) ABA (c) Gibberellin (d) Ethylene
Correct Answer:
Gibberellin
Explanation:
Gibberellins stimulate the synthesis of α-amylase and proteases enzyme in germinating grains of […]
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
The incorrect statement with regard to Haemophilia is:
Options
(a) It is a recessive disease (b) It is a dominant disease (c) A single proein involved in the clotting of blood is affected […]
The essential chemical components of many coenzymes are:
Options
(a) Nucleic acids (b) Carbohydrates (c) Vitamins (d) Proteins
Correct Answer:
Vitamins
Explanation:
The essential chemical components of many enzymes are vitamins, e.g., coenzyme nicotinamide […]
Isogamous condition with non-flagellated gametes is found in :
Options
(a) Spirogyra (b) Volvox (c) Fucus (d) Chlamydomonas
Correct Answer:
Spirogyra
Explanation:
In Spirogyra, sexual reproduction occurs through conjugation. Gametes are non-flagellated morphologically similar. […]
The cell-mediated immunity inside the human body is carried out by
Options
(a) B-lymphocytes (b) Thrombocytes (c) Erythrocytes (d) T-lymphocytes
Correct Answer:
T-lymphocytes
Explanation:
The cell-mediated immunity inside the human body is carried out […]
Pigment-containing membranous extensions in some cyanobacteria are:
Options
(a) Basal bodies (b) Pneumatophores (c) Chromatophores (d) Heterocysts
Correct Answer:
Chromatophores
Explanation:
In some photoautotrophic bacteria bacteriochlorophyll and bacteriophaeophytin or bacterioviridin pigments containing membraneous extensions […]
Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac Y gene?
Options
(a) Lactose permease (b) Transactylase (c) Lactose permease and transcetylase (d) β […]
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