Short Answer TypeName the enzyme produced by Streptococcus bacterium. Explain its importance in medical sciences.
Give a scientific term:
The development of an embryo without the occurence of fertilization.
Multiple Choice QuestionsMonoecious plant of Chara shows occurrence of
antheridiophore and archengoniophore on the same point
stamen and carpel on the same plant
upper antheridium and lower oogonium on the same plant
upper antheridium and lower oogonium on the same plant
Which of the following pairs is not correctly matched?
In vitro clonal propagation in plants is characterised by
PCR and RAPD
Northern blotting
Electrophoresis and HPLC
Electrophoresis and HPLC
Male gametes are flagellated in
Polysiphonia
Anabaena
Ectocarpus
Ectocarpus
C.
Ectocarpus
Male gametes are flagellated in Ectocarpus belonging to Phaeophyceae. The flagella of male and gamete plays an important role in establishing initial sexual contact with the female gamete. However, in Ectocarpus the female gamete too is flagellated but is different in structure.
In Polysiphonia (Rhodophyceae) flagellated gametes are not observed, in Anabaena sexual reproduction through gametes is absent while in Spirogya sexual reproduction takes place by conjugation wherein male gamete passes through a tube to the adjacent filament. The male gametes here are non-flagellated and show amoeboid movement.
Which is the most common mechanism of genetic variation in the population of sexually reproducing organism?
Transduction
Chromosomal aberrations
Genetic drift
Genetic drift
Which one of the following matches is correct?
| Phytophthora | Aseptate mycelium | Basidiomycetes |
| Alternaria | Sexual reproduction | Deuteromycetes |
| Mucor | Reproduction by conjugation | Asocmycetes |
| Mucor | Reproduction by conjugation | Asocmycetes |
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