Plant Kingdom T...

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Selaginella, Salvinia and Marsilea show heterospory.

Reason : They produce two kinds of sporesmicrospores and macrospores.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Bryophytes are successful land plants.

Reason : They grow successfully on wet and marshy land as it require water for completion of their life cycle.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : The gymnosperms are heterosporous.

Reason : They produce diploid microspores within sporangia.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Horsetails are represented by a single genus Equisetum

Reason : The leaves of Equisetum bear strobili at the tips of stems that produce spores.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Chlorella and Spirullina are rich are used as food supplements.

Reason : Both are rich source of carbohydrates.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Red algae have chemo-autotrophic mode of nutrition.

Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Red algae contribute in producing coral reefs.

Reason : Some red algae secrete and deposit calcium carbonate over their walls.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Coralloid roots are feature of Cycas plant.

Reason : These are specialized roots, which grow on the surface of soil.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Some Bryophytes are called liverworts.

Reason : Some Bryophytes are called as liverworts because their sporophyte resembles with liver lobes.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Phaeophyceae are brown in colour.

Reason : They do not have Chlorophyll b.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Volvox exhibits oogamous reproduction

Reason : It involves fertilization of non-motile female gamete or egg by means of a motile gamete or sperm.

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.

Assertion : Cycas is called as the ‘relic of past’.

Reason : Cycas exhibit phylogenetic relationship with pteridophytes.