Plant kingdom practice · Mixed difficulty

Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction. How many new Spirogyra plants are produced during sexual reproduction?

Sexual reproduction in Spirogyra is an advanced feature because it shows

The correct statements about bryophytes are
I. the sperms are biflagellate
II. the sperms are released into water and fuses with the egg to produce the zygote out side the body
III. zygotes undergoes reduction division immediately
IV. they produce a multicellular body called a sporophyte

In which of the following group would you place a plant, which produce seeds but lacks fruits?

Assertion (A): Sexual reproduction of Spirogyra is isogamous type.

Reason (R): Both of the fusing gametes of Spirogyra are non-flagellated and similar in size.

Consider the following statements I. They reproduce asexually by non-motile spores and sexually by non-motile gametes II. In this class, sexual reproduction is oogamous and accompanied by complex post-fertilisation developments III. The common members are Polysiphonia,Porphyra,Gracilaria and Gelidium The above characteristics are belongs to which class of algae

Of the following groups, which secrete and deposit calcium carbonate and appear like corals?

Choose the option that represents different genera included within pteridophytes

Select the mismatched pair.

The cells which do not degenerate after fertilization in 15
I) Synergids II) Antipodals III) Egg Cell IV) Secondary Nucleus
The Correct answer is

Assertion: Half of the total $C{O_2}$ fixation on earth is
carried out by algae.
Reason: Algae increases the level of dissolved oxygen
in their nearby environment

Assertion: Adiantum caudatum is a walking fern.
Reason: Adiantum grows vegetatively by their leaf tips.

Angiosperms are also called

A fern differs from a moss in having

In angiosperms seeds are enclosed by

Which of the following is wrongly matched?

Photosynthetic pigments of class-Rhodophyceae (red algae) are

Read carefully the given statements about algae and choose the correct option
I. The plant body is thalloid
II. Mainly aquatic
III. Reproduction takes place by vegetative, asexual and sexual
IV. Volvox and Ulothrix are the colonial form of algae

Which of the following contain xylem vessel ?

In a monoecious plant

Eutrophication is the result of

Terms artificial, natural and phylogenetic are related to types of

Complete the following paragraph by selecting the correct option for the blanks A, B, and C from the options
given below.

The symbiotic association formed by fungi with roots of higher plants is known as ___A___. It is mainly
formed by members from the genus ___B___. The fungal symbiont in these associations is responsible for
absorbing ___C___ from the soil and passing it to the plant. It also has many other benefits like resistance to
root borne pathogens, tolerance to salinity and drought, etc ___D___ seeds cannot germinate and establish
without the presence of __A___.

Phloem in gymnosperms lacks?

The organism which can fix atmosphere $C{O_2}$ and releases ${O_2}$ as by product is

The members of Phaeophyceae are commonly called

Mark the correct statement about Selaginella.

If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?

Algal zone is present in

Gymnosperms are characterised by