Plant Kingdom

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

Select the mismatch

1. Cycas – Dioecious
2. Salvinia – Heterosporous
3. Equisetum – Homosporous
4. Pinus – Dioecious

Zygotic meiosis is characteristic of

1. Fucus
2. Funaria
3. Chlamydomonas
4. Marchantia

Life cycles of Ectocarpus and Fucus respectively are

1. diplontic, haplodiplontic
2. haplodiplontic, diplontic
3. haplodiplontic, haplontic
4. haplontic, diplontic

Select the correct statement

1. Sequoia is one of the tallest trees.
2. The leaves of gymnosperms are not well adapted to extremes of climate.
3. Gymnosperms are both homosporous and heterosporous.
4. Salvinia, Ginkgo and Pinus all are gymnosperms.

In bryophytes and pteridophytes, transport of male gametes requires

1. birds
2. water
3. wind
4. insects.

Conifers are adapted to tolerate extreme environmental conditions because of

1. broad hardy leaves
2. superficial stomata
3. thick cuticle
4. presence of vessels.