Plant Kingdom

In which one of the following, the ovules are not enclosed by an ovary wall and remain exposed?

1. Pinus
2. Wolffia
3. Funaria
4. Selaginella

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Statement I is incorrect but Statement II is correct
2. Both Statement I and Statement II are correct
3. Both Statement I and Statement II are incorrect
4. Statement I is correct but Statement II is incorrect

Which one of the following is the characteristic feature of gymnosperms?

1. Seeds are absent
2. Gymnosperms have flowers for reproduction
3. Seeds are enclosed in fruits
4. Seeds are naked

Which of the following is the correct match?

1. Gymnosperms : Cedrus, Pinus, Sequoia
2. Angiosperms : Wolffia, Eucalyptus, Sequoia
3. Bryophytes : Polytrichum, Polysiphonia, Sphagnum
4. Pteridophytes : Equisetum, Ginkgo, Adiantum

Given below are two statements : One labelled as Assertion A and the other labelled as Reason R: In the light of the above statements, choose the correct answer from the options given below :

1. Both A and R are true but R is NOT the correct explanation of A
2. A is true but R is false
3. A is false but R is true
4. Both A and R are true and R is the correct explanation of A

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

Select the mismatch

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

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.

Conifers are adapted to tolerate extreme environmental conditions because of

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

In which of the following, gametophyte is not independent free living?

1. Pteris
2. Pinus
3. Funaria
4. Marchantia

Besides paddy fields, cyanobacteria are also found inside vegetative part of :

1. Cycas
2. Psilotum
3. Pinus
4. Equisetum

Cycas and Adiantum resemble each other in having

1. seeds
2. motile sperms
3. cambium
4. vessels

The gametophyte is not an independent, free-living generation in

1. Polytrichum
2. Adiantum
3. Marchantia
4. Pinus

A prokaryotic autotrophic nitrogen fixing symbiont is found in

1. Alnus
2. Cycas
3. Cicer
4. Pisum

Which one of the following plants is monoecious?

1. Pinus
2. Cycas
3. Papaya
4. Marchantia

Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms.

1. Perianth and two integuments
2. Embryo development and apical meristem
3. Absence of resin duct and leaf venation
4. Presence of vessel elements and absence of archegonia

In which one of the following male and female gametophytes do not have free living independent existence?

1. Polytrichum
2. Cedrus
3. Pteris
4. Funaria

In gymnosperms, the pollen chamber represents

1. a cavity in the ovule in which pollen grains are stored after pollination
2. an opening in the megagametophyte through which the pollen tube approaches the egg
3. the microsporangium in which pollen grains develop
4. a cell in the pollen grain in which the sperms are formed

Conifers differ from grasses in the

1. formation of endosperm before fertilization
2. production of seeds from ovules
3. lack of xylem tracheids
4. absence of pollen tubes

Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characterised features of

1. cycads
2. conifers
3. polypetalous angiosperms
4. gamopetalous angiosperms

Which one of the following is living fossil ?

1. Cycas
2. Moss
3. Spirogyra
4. Saccharomyces

Which one of the following is categorised under living fossils ?

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

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

Plant group with largest ovule, largest tree, and largest gametes is

1. gymnosperm
2. angiosperm
3. bryophyta
4. pteridophyta.