An invasive weed found in standing water is

A. Grass

B. Lotus

C. Aquarium oxygen plant

D. Water hyacinth

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In vegetative propagation, when the _____ come in contact with damp soil or water, they produce roots and new plants.

A. Shoot

B. Node

C. Axial shoot

D. Seed

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Which among the following is immortal

A. Sea algae

B. Amoeba

C. Plants grown by vegetative propagation

D. Every living organism is mortal

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The females of placental mammals exhibit cyclical changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase. In non-primate mammals it is known as

A. Oestrus cycle

B. Menstrual cycle

C. Reproductive cycle

D. Sexual cycle

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There are various types of reproduction. The type of reproduction adopted by an organism depends on:

A.The habitat and morphology of the organism

B.Morphology of the organism

C.Morphology and physiology of the organism

D.The organism’s habitat, physiology and genetic makeup

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There is no natural death in single celled organisms like Amoeba and bacteria because:

A.They cannot reproduce sexually

B.They reproduce by binary fission

C.Parental body is distributed among the offspring

D.They are microscopic

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Offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction because:

A.Sexual reproduction is a lengthy process

B.Gametes of parents have qualitatively different genetic composition

C.Genetic material comes from parents of two different species

D.Greater amount of DNA is involved in sexual reproduction.

 

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Non-flagellate spores are called conidia. In which organism they are seen?

A.Penicillium

B. Hydra

C. Chlamydomonas

D. Amoeba

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Development of zygote taking place outside the bodyis called?

A. Viviparous

B. Oviparous

C. Omnivorous

D. Surrogacy

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Parthenogenesis is the development of an organism directly from:

A.Female gametes

B.Vegetative cells

C.Fertilized ovum

D.None

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