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Plant Kingdom

Question
CBSEENBI11025980
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The character found only in halophytes is

  • sunken stomata

  • vivipary

  • velamen tissue

  • heterophylly

Solution

B.

vivipary

Vivipary is the phenomenon of having seeds germinating within the fruit, eg, halophytes (mangrove plants).

Sunken stomata are found in xerophytes, heterophylly (occurrence of different kinds of leaves in a single plant) is found in hydrophytes, while velamen tissue is found in epiphytes.

Velamen provides a mechanical function protecting the vascular tissues in the root cortex, shielding the root from transpirational water loss. It also adhered the plant to the substrate.

Some More Questions From Plant Kingdom Chapter

What is the basis of classification of algae?

When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?

Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.

Mention the ploidy of the following: protonemal cell of a moss; primary endosperm nucleus in dicot, leaf cell of a moss; prothallus cell of a ferm; gemma cell in Marchantia; meristem cell of monocot, ovum of a liverwort, and zygote of a fern.

Write a note on economic importance of algae and gymnosperms.

Both gymnosperms and angiosperms bear seeds, then why are they classified separately? 

What is heterospory? Briefly comment on its significance. Give two examples.

Explain briefly the following terms with suitable examples:
(i) protonema
(ii) antheridium
(iii) archegonium
(iv) diplontic
(v) sporophyll
(vi) isogamy

Differentiate between the following:
Red algae and brown algae

Differentiate between the following:
liverworts and moss

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