Plant Kingdom · Question 21

Which of the following algae contains mannitol as reserve food material?

1. Ulothrix
2. Ectocarpus
3. Gracilaria
4. Volvox

Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as :

1. Heterosporous
2. Homosorus
3. Heterosorus
4. Homosporous

Which of the following pairs is of unicellular algae?

1. Gelidium and Gracilaria
2. Anabaena and Volvox
3. Chlorella and Spirulina
4. Laminaria and Sargassum

Floridean starch has structure similar to

1. Amylopectin and glycogen
2. Mannitol and algin
3. Laminarin and cellulose
4. Starch and cellulose

Strobili or cones are found in

1. Pteris
2. Marchantia
3. Equisetum
4. Salvinia

From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:

1. Pteridophytes
2. Mosses
3. Liverworts
4. Gymnosperms

Pinus seed cannot germinate and establish without fungal association. This is because :

1. it has very hard seed coat
2. its seeds contain inhibitors that prevent germination
3. its embryo is immature
4. it has obligate association with mycorrhizae

Which of the following statements is correct?

1. Selaginella is heterosporous, while Salvinia is homosporous.
2. Stems are usually unbranched in both Cycas and Cedrus
3. Ovules are not enclosed by ovary wall in gymnosperms
4. Horsetails are gymnosperms

Which one is wrongly matched?

1. Biflagellate zoospores – Brown algae
2. Uniflagellate gametes – Polysiphonia
3. Unicellular organism – Chlorella
4. Gemma cups – Marchantia

An example of colonial alga is

1. Volvox
2. Ulothrix
3. Spirogyra
4. Chlorella