ST
4.
Answer the following questions in brief.
b) Why is alcohol not heated directly to remove chlorophyll from the leaves?
for photosynthesis?
positive result. Why?
e) What is the role of stomata present on the surface of leaves?
f) What is the similarity between the following:
i. A bread mould and a mushroom
ii. A Venus flytrap and a pitcher plant
iii. A mistletoe and the Cuscuta
iv. Rhizobium in leguminous plants and lichen
5.
Answer the following questions in detail.
a) Are all plants autotrophs? Justify your answers with examples.
a) On the basis of what factor, living organisms are divided into autotrophs and heterotrophs?
d) Ramesh took two plants. One with green leaves and the other with variegated leaves. He did an
experiment to demonstrate the presence of starch. He found that the plant with green leaves showed
c) Why do we add KOH in the bottle in the experiment to demonstrate that carbon dioxide is required
Answers
Answer:
these are too many questions:
b)alcohol is not directly heated to remove chlorophyll from the leaves because it is highly inflammable. so ,it is heated in a water bath beaker to remove chlorophyll.
e)Plants 'breathe' too, but they do it through tiny openings in leaves called stomata (singular: stoma). Stomata open and close to allow the intake of carbon dioxide and the release of oxygen. It's very important that they do this because this is the very oxygen that we ourselves need to breathe!
f)i Bread mould and mushroom are both fungi. They are saprotrophs i.e. they obtain nutrition from dead and decaying plant or animal matter. Saprotrophs dissolve the dead and decaying matter into a solution form by secreting digestive juices on them and then absorb the soluble nutrients from the solution
ii. The traps vary in kind from plant to plant. For example the Venus Fly trap catches its food in a different way then the Pitcher plant for instance. The major difference between traps is that some have moving parts, and some do not.
iii. Cuscuta belong to the morning glory family. ... Mistletoe and cuscuta are both parasitic plants deriving much of their nutrients from host trees. Cuscuta's colors range from red to orange and variations there of. Mistletoe is green and can photosynthesize on its own if need be where as cuscuta can not.
iv. Both shows symbiotic relationship. As Legume plants shows with Rhizobium bacterium and Lichen (the relationship between algae and fungi). they both are heterotrophs and and perform symbiotic relationship.
5
a)No all plants are not autotrophs . Autotrophs means plant make Thier own food by inorganic sources . They make food by the process of photosynthesis (necessary for making food are sunlight ,CO2 ,water ) . Generally alla green plants makes own food by the process called photosynthesis and are called autotrophs .
a)On the basis of how organisms obtain their food ie. mode of nutrition, they are divided as Autotrophs and Heterotrophs
d)Green leaves contain chlorophyll, a green pigment which absorbs sunlight, essential for starch preparation.
On the other hand, variegated leaves have green and non-green colours. So the green parts absorb sunligh and prepare starch whereas non-green parts fail to do so.
c)The reason for use of koh (potassium hydroxide) in the bottle in the experiment to demonstrate that carbon dioxide is required for photosynthesis is to determine the carbondioxide from the surrounding plant
Answer:
4.b) alcohol is not directly heated to remove chlorophyll from the leaves because it is highly inflammable. so,it is heated in a water bath beaker to remove chlorophyll. 5.0.
e)Stomata allow a plant to take in carbon dioxide, which is needed for photosynthesis. They also help to reduce water loss by closing when conditions are hot or dry. ... In aquatic plants, stomata are located on the upper surface of the leaves.
f)a).Bread mould and mushroom are both fungi. They are saprotrophs i.e. they obtain nutrition from dead and decaying plant or animal matter. Saprotrophs dissolve the dead and decaying matter into a solution form by secreting digestive juices on them and then absorb the soluble nutrients from the solution.
b).The traps vary in kind from plant to plant. For example the Venus Fly trap catches its food in a different way then the Pitcher plant for instance. The major difference between traps is that some have moving parts, and some do not.
c).Mistletoe has lethary green leaves so it can carry out photsynthesis and it only needs some of the nutrients. Mistletoe has leathery green leaves so it can carry out photosynthesis and it only needs some of the nutrients. Cuscuta is called totally parasitic because it can't synthesis it's own food.
d).Legumes form a unique symbiotic relationship with bacteria known as rhizobia, which they allow to infect their roots. This leads to root nodule formation where bacteria are accommodated to convert nitrogen from the air into ammonia that the plant can use for growth.
5.a).No all plants are not autotrophs . Autotrophs means plant make Thier own food by inorganic sources . They make food by the process of photosynthesis (necessary for making food are sunlight ,CO2 ,water ) . Generally alla green plants makes own food by the process called photosynthesis and are called autotrophs.
b).Answer: On the basis of how organisms obtain their food ie. mode of nutrition, they are divided as Autotrophs and Heterotrophs.
c).The reason for use of koh (potassium hydroxide) in the bottle in the experiment to demonstrate that carbon dioxide is required for photosynthesis is to determine the carbondioxide from the surrounding plant.
d).ANSWER: By usage of Iodine test, presence of starch could be found on the leaves. EXPLANATION: When Ramesh puts the plant with green leaves in an iodine solution, it has turned blue black in color that indicates the presence of starch whereas variegated plant leaf does not contains starch....