Assertion: A mangrove tree growing in marshy place has pneumatophores.
Reason: Pneumatophores help in better anchorage to marshy soil.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
C.
If assertion is true but reason is false
Mangroves which form shallow littoral forests near sea shores areas are halophytes. Mangrove grow in physiologically dry environment (water is available in plenty but in the form of strong salt solution). These plants develop shallow rootings due to water logged environment where oxygen scarcity prevails. To ensure proper aeration in root system, plants produce respiratory roots or pneumatophores which are negatively geotropic peg-like projections above ground with numerous pores or lenticels for gaseous exchange:
Photochemical smog formed in congested metropolitan cities mainly consists of
ozone, peroxyacyl nitrate and NOx
smoke, peroxyacyl nitrate and SO2
hydrocarbons, SO2 and CO2
hydrocarbons, ozone and SO2
One out of the following is not responsible for biodiversity loss
Alien species invasion
Co-extinction
Ex-situ conservation
Deforestation
Which of the following statements is not true
The biodiversity decreases with increasing latitude.
The biodiversity decreases with increasing altitude.
The fishes show greatest biodiversity among vertebrates.
The biodiversity of bryophytes is greater than that of angiosperms
Which of the following is best method of germplasm conservation
Herbarium
Botanical garden
Seed bank
Zoological park
Which of the following options consist of nonessential amino acids only
Valine, leucine, glycine, alanine
Glycine, serine, proline, glutamic acid
Proline, aspartic acid, glutamic acid, methionine
Cysteine, tyrosine, alanine, isoleucine
Assertion: There are 34 biodiversity hotspots in the world.
Reason: High level of species richness is a criteria for selection of a biodiversity hotspot.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false
Assertion :Now-a-days, the biodiversity is declining with an accelerated rate.
Reason : Exotic species are considered to be a major cause of extinction of species.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
