TRUE OR FALSE. IF TRUE SHADE A IF FALSE SHADE B 1. Some viruses have beneficial

Question

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 between organisms other than by descent 4. Hermaphrodites cannot self-fertilize. 5. Embryonic torsion occurs in the class cephalopoda of the Phylum 6. Pathenogenesis is the process by which unfertilized eggs develop into 7. Sexual reproduction produces more numerous offsprings in a short 8. Fragmentation is the braking of the body of an organism into several Mollusca (often) haploid adults. period than asexual reproduction. pieces some or all of which develop into complete adult. 9. The nutrient in a developing plant embryo is the endosperm. 10. Bacteria form endospores in order to overcome harsh conditions 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. 15. Human do not communicate by means of pheromones under any condition 16. Viral diseases can be treated using modern day antibiotics. 17.Tuberculosis is caused by a viral infection 18. All plants have a tap-root. 19.All bacteria have deleterious effect.

Explanation / Answer

1. Some viruses have beneficial effects. TRUE

Some viruses have beneficial effects, For example in medicine viruses used as vectors or carriers that take the needed material for treatment of disease to target cells.

2. The complete viral particle is known as a virion. TRUE

A complete virus particle is called as a virion that consists of nucleic acid which is surrounded by a protective coat of protein called as capsid.

3. Horizontal gene transfer is the movement of genetic material between organisms other than by descent : TRUE

Horizontal gene transfer or lateral gene transfer is defined as the movement of genetic material between unicellular or multicellular organisms other than by descent which is called as the vertical transmission ( transmission of DNA from parent to offspring).

4. Hermaphrodites cannot self- fertilize : TRUE

Hermaphrodites cannot self- fertilize which is the common misconception about hermaphroditic that organisms fertilize their own eggs with their own sperm. But true is that most species do not self-fertilize, and many species are physically incapable to self-fertilize. For instance, sponges fertilize externally and release eggs and sperm into the plankton, so that gametes encounter, and fertilized from other individuals

5. Embryonic torsion occurs in the class cephalopoda of the Phylum Mollusca : FALSE

Embryonic torsion occurs in gastropods
4 classes of phylum mollusca are :
- phylum polyplacophora (chitons)
- class gastropoda
- class bivalvia
- class cephalopoda


6. Pathenogenesis is the process by which unfertilized eggs develop into (often) haploid adults : TRUE

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