CBSE Class 9 Answered
give reasons for the following:
(i)blue green algae is placed in monera not in plantae.
(ii)bryophyta and pteridophyta grow in moist places.
(iii)gymnosperms donot require water for fertilisation.
Asked by | 04 Feb, 2014, 08:38: PM
Expert Answer
Monera are prokaryotic unicellular bacteria whose genetic material is dispersed loosely in the cell. On the other hand, the genetic material of plants and other eukaryotes is held in the cell nucleus. Therefore, blue green algae are placed in Kingdom Monera and not inKingdom Plantae.
Bryophyta and Pteridophyta grow in moist and shady places because they do not have the ability to withstand sunlight. Their tissues are thin and delicate, forming large surface areas for transpiration. Staying in the shade conserves water that sun and heat would otherwise evaporate.
The Gymnosperms are seed plants. They do not require water for the sperms to swim and reach the egg. The movement of pollen towards the ovule in Gymnosperms relies on air-borne transport and not water transport.
Answered by | 05 Feb, 2014, 10:51: AM
Application Videos
-
Classification of Plants
This video explains the concept of classification of plants. -
Cryptogams and Phanerogams
This video explains the classification of plants into cryptogams and phaner... -
Classification of Non-Chordates
This video explains the basis of classification of organisms with the help ... -
Classification of Vertebrates
This video explains the basis of classification of organisms with the help ... -
Classification of Vertebrates
This video compares the characteristics of amphibians and fishes.
Concept Videos
-
Classification of Organisms
Explain the rules of nomenclature. Evolving of present classification syst... -
Kingdom Plantae
Explain the classification of plant kingdom. The features of the various d... -
Classification of Animals
Understand the basis of classification of Animal kingdom into various phyl... -
Five Kingdom Classification
Explain five kingdom of biodiversity. Classification of living organism wi... -
Classification of Animals
Learn the features of various Acoelomates i.e. Poriferans, Platyhelminthes...
CBSE 9 - Biology
Asked by sohamshaurya28 | 28 Sep, 2023, 06:51: PM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by taoraicalvincalvin | 02 Jun, 2022, 02:05: PM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by asaikeerthana77 | 31 May, 2022, 11:51: AM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by asaikeerthana77 | 31 May, 2022, 11:50: AM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by jiyapatel9909 | 27 May, 2022, 02:18: PM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by vloggershanvi | 18 Feb, 2022, 11:50: AM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by lakshmithengal | 04 Dec, 2021, 07:34: AM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by drtapankumarb | 25 Nov, 2021, 03:53: PM
ANSWERED BY EXPERTCBSE 9 - Biology
Asked by ni095186 | 24 Aug, 2021, 09:57: AM
ANSWERED BY EXPERT
