Life Processes Notes Sample Essay

Q1. Distinguish between autophytic and heterotrophic nutrition with illustrations Autotrophic Nutrition| Heterotrophic Nutrition|
The manner of nutrition in which beings can fix their ain nutrient. utilizing natural stuffs H2O and C dioxide. in the presence of sunshine and chlorophyll| It is the manner of nutrition in which beings can non fix nutrient on their ain and therefore depend on autophyte for nutrient. | Eg: All green workss. blue green algae| Eg: adult male. Fungi. Equus caballus

Q2. Why is diffusion insufficient to run into the O demands of multicellular beings like worlds? Ans – In multicellular beings. there are 1000000s of cells. These cells are non in direct contact with the environment. hence simple diffusion from cell to cell can non run into the demand of all the organic structure cells. Q3. What are the four indispensable demands for photosynthesis. Besides mention the beginning of each of these. Ans – 1 ) Carbon dioxide ( from atmosphere )

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2 ) Water ( from the dirt – absorbed by root hairs )
3 ) Sunlight ( from the Sun )
4 ) Chlorophyll ( present in the chloroplast in green parts of the works ) Q4. Why in individual cell beings ( like ameba. etc ) specific variety meats for taking nutrient. exchange of gases. etc. are non required? Ans – This is because there is merely one cell. The full surface of the being is in contact with the environment and simple cell – cell diffusion can run into all the demand. Q5. What are the three types of heterotrophic nutrition?

Ans – 1 ) Parasitic nutrition – The manner of heterotrophic nutrition in which the being ( parasite ) obtains nutrition from another being ( host ) either from its surface or by come ining its organic structure. 2 ) Saprophytic nutrition – The manner of heterotrophic nutrition in which the being ( saprophytic organism ) feeds on dead and disintegrating organic affair. Eg: fungi 3 ) Holozoic nutrition – The manner of heterotrophic nutrition in which the being feeds on solid nutrient. ( can even be the whole being ) . Eg: adult male. dog Q6. Distinguish between ectozoans and entoparasites. Give an illustration of each Ans – Ectoparasites –The parasites which feed on the surface of the host being are called ectozoans. Eg: hair lice. bloodsucker Endoparasites –The parasites which feed on the host being by come ining their organic structure are called entoparasites. Eg: Tapeworm Q7. Give an illustration each of a works and animate being parasite

Ans – Plant parasite – cascuta ( amarbel )
Animal parasite – cestode
Q8. Name the nutrition in Fungi
Ans – Saprophytic nutrition
Q9. What do you intend by photosynthesis? Write the 3 stairss and its equation Ans – Photosynthesis is defined as the procedure by which green workss make their ain nutrient in the presence of natural stuffs H2O and C dioxide in the presence of sunshine and chlorophyll giving out O gas as waste is called photosynthesis. Equation:8 CO2 +6 H2O C6 H12 O6 + 6 O2 + enegy



The three of import stairss taking topographic point in photosynthesis are: 1. Absorbtion of light energy by chlorophyll
2. Conversion of light energy into chemical energy and splitting of H2O into H and O 3. Decrease of C dioxide to organize saccharides.
Q10. Why do workss look green?
Ans – this is because green workss contain a pigment called chlorophyll which absorbs all other colourss but reflects green colour visible radiation as a consequence of which the workss appear to be green. Q11. Name the site and map of chlorophyll in workss


Ans – Chlorophyll is a green colored pigment which is found in the grana portion of the chloroplast. It traps sunlight and thereby helps in photosynthesis. Q12. What do you intend by chloroplasts? Where are they present in workss? What do they incorporate? Ans – chloroplasts are green colored cell cell organs which are found in the palisade tissue below the upper cuticle. They contain a green colored pigment called chlorophyll. Q13. What do you intend by pore? Where are they present in the workss? Give their maps Ans – Stomata are bantam pores / gaps present in the areal parts of the works ( below the upper cuticle ) . The maps of pores are as follows: 1 ) They help in gaseous exchange in workss

2 ) The workss lose H2O in the signifier of H2O vapour from the areal parts through transpiration. This helps to maintain the workss cool every bit good as aids in upward transit of H2O and minerals from the root hair to the foliages. 3 ) They prevent loss of extra H2O by modulating the gap and shutting of pores guard cells. 4 ) Besides. the gaseous exchange through pores besides helps in photosynthesis as air rich in CO2 Q14. Pull a good – labeled diagram of pores demoing unfastened and close aperture Q15. With the aid of an activity explain that sunshine is necessary for photosynthesis. Ans – We take a healthy potted works and maintain it in dark for about 72 hours to destarch it. Then pluck a few foliages and cover a portion of them with black paper so that no visible radiation is seeable to that part.

Then we perform the amylum trial and we observe that the portion of the foliage covered with paper did non turn bluish – black on adding and if you cover the paper with the sunshine. the iodine colour remains brown. Q16. With the aid of an activity and diagram. explicate how cholorphyll is necessary for photosynthesis Ans – We take a works with varicolored foliages ( i. . vitamin E they have green and non green parts ) . We leave the works in sunshine for a piece and so we pluck one foliage and execute the amylum trial. We observe that the green portion turns bluish – black with iodine solution and the non green portion ( i. e. the portion does non incorporate chlorophyll ) remains brown. This confirms that chlorophyll is necessary for photosynthesis.

Q17. With the aid of an activity. explicate how CO2 is necessary for photosynthesis. Ans – We take two bell jars. We put one healthy potted works in each of the bell jars. In the first bell jar a tubing incorporating KOH is kept ( KOH is an absorber of CO2 gas ) . Both the jars are kept in the Sun. After 6 – 8 hours. a foliage is plucked from both the workss and is subjected to the amylum trial. We observe that the foliage in the first jar remains brown whereas the foliage in the 2nd turns bluish – black with I. .

Q18. name the signifier in which energy in stored in workss and animate beings Ans – workss – amylum. animate beings – glucagon
Q19. Name the signifier of energy absorbed for photosynthesis and the signifier it is converted into Ans – solar energy ; chemical energy

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