ANSWER ALL QUESTIONS TRUE OR FALSE. IF TRUE SHADE A IF FALSE SHADE B 1. Some vir

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ANSWER ALL QUESTIONS TRUE OR FALSE. IF TRUE SHADE A IF FALSE SHADE B 1. Some viruses have beneficial effects. 2. The complete viral particle is known as a virion. 3. Horizontal gene transfer is the movement of genetic material betweern organisms other than by descent. 4. Hermaphrodites cannot self-fertilizeg 5. Embryonic torsion occurs in the class cephalopoda of the Phylum Mollusca. Pathenogenesis is the process by which unfertilized eggs develop into (often) haploid adults. 6. 7. Sexual reproduction produces more numerous offsprings in a short period than asexual reproduction. Y8. Fragmentation is the braking of the body of an organism into several pieces some or all of which develop into complete adult. 3 f9. The nutrient in a developing plant embryo is the endosperm.A T10. Bacteria form endospores in order to overcome harsh conditions. T 11. Lignin is a tissue in plants that reinforces the conducting vessels to enable the plant stand firm. 12. Alexander Flaming discovered the art of vaccination 13.Organisms that depend on organic molecules into to manufacture energy are known as autotrophs. 14. chordates such as reptiles that incapable of regulating their body temperatures are said to be cold-blooded T 15. Human do not communicate by means of pheromones under any condition. 16. Viral diseases can be treated using modern day antibiotics. A F 17.Tuberculosis is caused by a viral infection. F18. All plants have a tap-root &F; 19.All bacteria have deleterious effect. F

Explanation / Answer

Ans 1: True. Norovirus in mice has been found to be beneficial when introduced in the gut of mice.

Ans 2: True. The complete viral particle, intact with capsid and inner core nucleic acid is called virion.

Ans 3: True. There should not be any progeny-parent relationship (descent) between the participating genes for a transfer to be classified as horizontal.

Ans 4: False. Not all hermaphrodites can self fertilize, sometimes due to physical incapability, like in the case of earthworms, two individuals have to orient themselves in opposite direction for mating and fertilization to occur because their reproductive organs are so align at the the two ends of the length of their body that self-fertilization is not possible.

Ans 5: False. Embryonic torsion occurs in gastropods such as snails and slugs and not cephalopods like squids and octopus. Both gastropods and cephalopods belong to the Phyllum Mollusca though.

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