Which 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

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

Which of the following is a total root parasite?

• Cuscuta

• Rafflesia

• Santalum

• Monotrapa

When pollen tube enters through micropyle, the process is called

• Porogamy

• Chalazogamy

• Mesogarny

• Apogamy

Outer wall of pollen grain is made up of

• Cellulose

• Sporopollenin

• Pectocellulose

• Lignin

69.

DNA replication occurs in

• G₁-phase

• S-phase

• G₂-phase

• M-phase

AIDS virus contains

• RNA with protein

• DNA with protein

• DNA without protein

• bNA only