Selina solutions concise biology class 9 icse Solutions for Chapter 7 respiration in plants

Give the overall chemical equation for the two kinds of respiration in plants: (i) Aerobic (ii) Anaerobic

Mention any one difference other than those reflected in the two chemical equations given above.

Certain organisms respire only anaerobically throughout their lives. Name any two such organisms

In experiments on respiration, the seeds taken as control are boiled. Why?

What is the use of the following in the experiments on respiration?

(i) Soda lime

(ii) Limewater

Suppose we conduct an experiment to demonstrate respiration in a green plant. What special precaution is required to be taken in it?

Fill in the blanks. In anaerobic respiration in plants, the end product is _________ and ___________ instead of lactic __________ in animals.

The table below is intended to give certain differences between photosynthesis and respiration, but a few points are given wrongly. Strike out the wrong ones and write the correct words instead.

Photosynthesis Respiration

(i) Results in loss in weight – Results in gain in weight

(ii) Sucrose is the product – Sucrose is broken down

(iii) Occurs in green cells only – Occurs in all cells

(iv) Uses water and oxygen – Uses glucose and oxygen

Glycolysis is a process

(a) In which glycogen is broken down into glucose

(b) Which occurs in mitochondria

(c) In which glucose is broken down into pyruvate

(d) That occurs next to Krebs cycle.

One same common function is performed by? (a) Stomata and veins (b) Stomata and lenticels (c) Lenticels and sepals (d) Lenticels and hydathodes

Who had introduced the binomial system of naming living beings?

Which two characters out of (a)-(e) given below are common to dog, humans, squirrel, bat, camel and monkey?

(a) Scales on the skin.

(b) wings.

(c) External ears.

(d) Give birth to young ones.

(e) A functional tail.

Anaerobic respiration normally occurs in (a) Grass (b) Cactus (c) Coconut (d) Baker’s yeast

Do the plants respire all day and all night or only at night? ____________

Name the following:

(a) Energy currency of cell.

(b) Oxidative breakdown of carbohydrates to release energy.

(c) An organism which respires throughout life anaerobically.

(d) A common phase in both aerobic and anaerobic respiration.

(e) Aerobic respiration requires _______\__

(f) A chemical which removes CO2 from the air

Mention if the following statements are true or false. If false, rewrite them correctly. (a) Aerobic respiration of one mole of glucose yields 138 ATP T/F (b) Anaerobic respiration in plants yields lactic acid T/F (c) Carbon dioxide readily dissolves in lime water T/F (d) All leaves of a green plant normally respire anaerobically at night. T/F

What happens to the energy liberated in respiration?

Why is it usually difficult to demonstrate respiration in green plants?

Explain why respiration is said to be the reverse of photosynthesis

How is the tilting of the soil useful for the crops growing in it?

Write the full form of ATP and ADP.

Can cell respiration occur in any organism at a temperature of about 65°C? Give reason

Fill in the blanks: (a) _______ are the openings found on older stems. (b) Glycolysis occurs in the _________ of the cells. (c) __________ is a respiratory substance. (d) Rate of ___________ is more than the rate of __________ in the daytime in the case of green plants. (e) __________ is a chemical substance which absorbs oxygen of the air. (f) __________ is used to create vacuum to show anaerobic respiration.

What is respiration? How are respiration and burning similar and how are they different?

How are aerobic and anaerobic respirations different in plants?

Describe one experiment each you would perform to demonstrate the following phenomena:

The germinating seeds

(a) Produce heat,

(b) Give out carbon dioxide,

(c) Can respire even in total absence of air

How do the following structures help in respiration in plants? (a) Lenticels ____________ (b) Stomata _____________ (c) Root hairs _____________

The following two chemical reactions are supposed to indicate a certain process occurring in the green plants under two different conditions:

(i) Fill in the blanks of each reaction

(ii) Name the process represented by the two chemical equations

(iii) What are the conditions under which the two reactions (a) and (b) are occurring?

The following diagram refers to an apparatus which is used to demonstrate a physiological process:

(a) What is the purpose of keeping potassium hydroxide solution in the test tubes X and Y?

(b) Why has the coloured water risen in tubing 1?

(c) What is the purpose of keeping boiled peas soaked in a disinfectant in test tube Y?

(d) Name the biological process which causes the above rise.

(e) Define the biological process shown in the experiment.

Given below is a set of six experimental set-ups (A-F), kept in this state for about 24 hours.

(a) In how many flasks, the different plant parts have been kept under observation?

(b) What is the purpose of keeping a test-tube containing limewater in each flask?

(c) In which tube/tubes the limewater will turn milky?

(d) What is the purpose of the set-up F?

(e) What conclusion can you draw from this experiment?

In order to study and prove a particular physiological process in plants, the following experiment was set up. Study the same and then answer the questions that follow:

(a) Name the physiological process being studied.

(b) What is the function of soda lime in the bottle ‘A’ and why is limewater placed in bottle ‘B’?

(c) What change would you expect to observe in bottle ‘D’?

(d) Represent the physiological process named in (a) above in the form of a chemical equation.

(e) In order to obtain accurate results, the bottle ‘C’ should be covered with a piece of black cloth. Why?

(f) If bottle ‘C’ was fitted with a 3-holed rubber stopper and a thermometer were introduced in such a way that its bulb reaches close to the germinating seeds, what would you observe? Why?