Question

Name the following
a. A parasitic plant which is devoid of leaves, having yellow, slender tubular stem.
b. A solution used to test the presence of carbohydrates.
c. A plant that has both autotrophic and heterotrophic nutrition.
d. The by which organism obtain energy from the digested food.​

Answer 1

Answer:

Cuscuta is an example of Parasite. It takes shelter in a host cell. It’s dependent on food from another organism. Ectoparasites are parasites that reside on a host organism’s surface.

(ii) A plant that has both autotrophic and heterotrophic mode of nutrition – Pitcher plant

Pitcher plant traps insects because it grows in soils which lack in nitrogen. Pitcher plants carry out photosynthesis to produce carbohydrates. But for nitrogen source, it traps and digests the insects.

(iii) The pores through which leaves exchange gases – Stomata

Lamina is the green expanded part of the leaf with veins and veinlets. The midrib is a middle prominent vein. Veins provide rigidity to leaf and act as channels for transport of water, minerals and food materials. Stomata are the minute pores usually located on the underside of the leaves and take part in the exchange of gases (02 and CO2) during photosynthesis and respiration. They are surrounded by guard cells.

Explanation:

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Answer 2

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$\huge\tt{a}$dodder plant

$\huge\tt{b}$Tollen's test – Given sample food + Tollen's reagent → Silver mirror confirms the presence of carbohydrates. Iodine test – Given sample food + Iodine solution → Blue colour solution confirms the presence of starch.

$\huge\tt{c}$pitcher plant

The pitcher plant has both autotrophic and heterotrophic mode of nutrition.

$\huge\tt{d}$Respiration is the process of breakdown of digested food to obtain energy.