Plant Kingdom

Sexual reproduction in Spirogyra is an advanced feature because it shows

1. different sizes of motile sex organs
2. same size of motile sex organs
3. morphologically different sex organs
4. physiologically differentiated sex organs.

Plants reproducing by spores such as mosses and ferns are grouped under the general term

1. cryptogams
2. bryophytes
3. sporophytes
4. thallophytes.

Which one pair of examples will correctly represent the grouping spermatophyta according to one of the schemes of classifying plants?

1. Acacia, sugarcane
2. Pinus, Cycas
3. Rhizopus, Triticum
4. Ginkgo, Pisum

Which one of the following is categorised under living fossils ?

1. Cycas
2. Metasequoia
3. Pinus
4. Selaginella

Chlorenchyma is known to develop in the :

1. Mycelium of a green mould such as Aspergillus
2. Pollen tube of Pinus
3. Cytoplasm of Chlorella
4. Spore capsule of a moss

Which of the following is without exception in angiosperms?

1. Presence of vessels
2. Double fertilisation
3. Secondary growth
4. Autotrophic nutrition

Which of the following plants produces seeds but not flowers?

1. Maize
2. Mint
3. Peepal
4. Pinus

Cycas has two cotyledons but not included in angiosperms because of

1. naked ovules
2. seems like monocot
3. circinate ptyxis
4. compound leaves

A student observed an alga with chlorophyll a, d and phycoerythrin, it should belong to

1. Phaeophyta
2. Rhodophyta
3. Chlorophyta
4. Bacillariophyta

In ferns, meiosis takes place at the time of

1. spore formation
2. spore germination
3. gamete formation
4. antheridia and archegonia formation