Multiple Choice QuestionsWhich extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Chorion
Allantois
Yolk sac
Amnion
A transgenic food crop, which may help in solving the problem of nightblindness in developing countries is
Flavr savr tomatoes
Starlink maize
Bt soyabean
Golden rice
Polyploidy can be induced by the application of
Auxin
Kinetin
Colchicine
Ethylene
C.
Colchicine
Colchicine is a poisonous chemical, isolated from seeds and bulbs of autumn crocus (Colchicum autumnale). It blocks spindle formation and thus, inhibits the movement of sister chromatids to the opposite poles. The resulting restitution nucleus includes all the chromatids. As a result, the chromosome number of the cell is doubled, which leads to polyploidy.
Which of the following bio-engineered bacteria is utilized for cleaning of marine oil slicks?
Escherichia coli
Pseudomonas syringae
Pseudomonas putida
Rhizoctonia solani
Cells obtained from cancerous tumours are known as
Hybridomas
Myelomas
Lymphocytes
Monoclonal cells
When pollen tube enters through micropyle, the process is called
Porogamy
Chalazogamy
Mesogarny
Apogamy
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