Hello Students: DAY-2 Morning Coffee with NEET

HELLO STUDENTS: DAY-2 Morning

1.Important Vital Stains used in Cytological Techniques:

*EOSIN is used to stain Cytoplasm (Pink).

*FEULGEN'S STAIN is used to stain DNA(Purple).

*JANUS GREEN B is used to stain Mitochondria and Fungi(Green).

*METHYLENE BLUE is used to stain Golgi bodies and Yeast (Blue).

*TOLUDINE BLUE is used to stain RNA(Blue).

*HEMATOXYLINE is used to stain Nucleus and Cell Wall (Violet)

2.Absent (devoid of / lack of /not found )cases in plants :

*Phloem parenchyma, Phloem fibres Vascular cambium, Secondary growth and Shoot hairs( Trichomes) are absent in MONOCOTS.

*Xylem vessels or Trachae are absent in Gymnosperms EXCEPT Gnetum ,Ephedra and Welwitschia.

* Xylem fibres , Companion cells and Sieve tubes are absent in GYMNOSPERMS.

*Phloem fibres,Xylem fibres and Tracheids are absent in Dicot leaves.

* Vessels are absent in few angiopermic families Winteraceae,Tetracentraceae and Trochodendracae.

3.Terminology used in Pollination based on its agents :

*ANEMOPHILY: Pollination by Wind

*HYDROPHILY:  Pollination by Water

*CANTHAROPHILY: Pollination by Beetle

*PHALAENOPHILY: Pollination by Moths

*MELLITOPHILY: Pollination by Bees

*PSYCHOPHILY: Pollination by Butterflies

*MALACOPHILY: Pollination by Snails

*ORNITHOPHILY: Pollination by Birds

*CHIEROTEROPHILY: Pollination by Bats

*MYRMECOPHILY: Pollination by Ants.

4.Common Mendelian Genetic Ratios:

*Mendelian Monohybrid phenotypic ratio= 3:1

*Mendelian Monohybrid genotypic ratio=1:2:1

*Mendelian Monohybrid Test cross ratio (or) Recessive Back cross ratio ( Both phenotypic and genotypic ratios )=1:1

*Mendelian Dihybrid Test cross ratio(Both phenotypic and genotypic ratio)= 1:1:1:1

*Mendelian Dihybrid phenotypic ratio=9:3:3:1

*Mendelian Dihybrid genotypic ratio =1:2:1:2:4:2:1:2:1

* Mendelian Trihybrid phenotypic ratio= 27:9:9:9:3:3:3:1

5.Different types of plants based on its Habitat.

*CALCIPHYTES:Plants living in calcium rich alkaline soil.

*CRYOPHYTES:Plants living in ice surface.

*CRYPTOPHYTES: Plants living below the soil surface.

*CHASMOPHYTES:Plants living in rocky crevices .

*HALOPHYTES:Plants living in saline soils.

*HELIOPHYTES:Plants living in well lighted areas.(eg: Angiosperms)

*LITHOPHYTES:Plants living on rocky surfaces.

*OXYLOPHYTES:Plants living in acidic soils

*PSAMMOPHYTES: Plants living in sandy soils.

*SCIOPHYTES:Plants living in shadow areas ( eg: Bryophytes and Pteridophytes)

*HYDROPHYTES:Plants living in water.

*XEROPHYTES:Plants living in dry or xeric condition .

*MESOPHYTES: Plants living in moderate condition.

*EPIPHYTES: Plants living on another plant.

*HYGROPHYTES: Plants living in moist damp and shady places.Eg: Habenaria(Orchid) and Mosses(Bryophytes).

By

Mr.R.Soundarapandian, MSc, MEd, MPhil, 

PG Asst Zoology 

Sir MCTM Boys Higher Secondary School, 

Purasawalkam Chennai-84.