Hydroids and leptoids are conducting tissues of

Updated On: Jun 23, 2023

pteridophytes
mosses
algae
gymnosperms.

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The Correct Option is B

Solution and Explanation

Bryophytes are considered "nonvascular plants" which means they do not contain a true vascular system such as xylem and phloem. In them a simpler conducting tissue is found that too only in mosses. These conducting cells that transport nutrients and water throughout the moss plants are called hydroids and leptoids. They are similar to xylem and phloem except they lack specialized, lignin-containing wall thickenings. Their cell walls are much thinner and yet very permeable to water and solutes.

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LIST I Classes of world vegetation on the basis of temperature	LIST II Example
A	Megatherms	I	Alpine vegetation
B	Mesotherms	II	tropical rain forest
C	Microtherms	III	Coniferous forest
D	Hekistotherms	IV	Tropical deciduous forest

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Concepts Used:

Plant Kingdom

The Plant Kingdom comprises all the plants that have some shared characteristics. These are bacteria (prokaryotes), photosynthetic plants, fungi, and several non-photosynthetic plants.

Read Also: Two Kingdom Classification

Several features of Kingdom Plantae are as follows:

They are stationary. They are static and usually remain in one place only.
They have branches that expanded and green leaves due to the presence of chlorophyll.
They are an autotrophic mode of nutrition that simply means they prepare their food with the help of water, sunlight and carbon dioxide. It is further known as self-nutrition.
They indulge in photosynthesis during the day and therefore more carbon dioxide is needed during the day and at night it is released.
They secure their food in the form of starch-like algae.
They have an inelastic wall around their cell known as a cell wall comprised of cellulose.
There is an absence of the nervous system and excretory system.
Reproduction is entirely dependent on air, insects and water. Asexual and vegetative method of reproduction is noticed or detected.
The non-photosynthetic plants acquire their food through parasitism, i.e through their host like Indian pipe.

Read More: Classification of Plants

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Column-I (Plant groups)		Column-II (Examples)
1.	Bryophyta	p.	Pinus
2.	Gymnosperm	q.	Adiantum
3.	Algae	r.	Sphagnum
4.	Pteridophyta	s.	Ectocarpus