QUIZ PHOTOSYNTHESIS IN PLANTS
QUIZ PHOTOSYNTHESIS IN PLANTS Read More »
IMPORTANT TERMS
GUTTATION: Loss of water from the edges of the leaves through a stomata like opening called hydathode.
TRASPIRATION: Loss of water in the form of vapours from the living through the aerial parts of plant.
PHOTOSYNTHESIS IN HIGHER PLANTS
1.Light reaction or photochemical reaction—-The assimilatory power is generated in thylakoids.
2. Dark reaction or thermochemical reaction—-Fixation of CO₂ into carbohydrated this takes place in stroma of chloroplast.
PHOTOSYNTHESIS IN HIGHER PLANTS Read More »
SOIL WATER RELATION
HOLARD: The total amount of water present in the soil.
CHESARD: Water available to the plants.
ECHARD: Water that can not be absorbed by plants.
SOIL WATER RELATION Read More »
MEIOSIS – II IN ANIMAL AND PLANT CELL
MEIOSIS –II is not mitosis because in meiosis-II:
•1.It occur with haploid chromosome.
•2.Two chromatids are not always similar due to crossing over. 3.Daughter cell are different from parent cell in the matter of gene recombination
MEIOSIS – II IN ANIMAL AND PLANT CELL Read More »
BASIC TERMS IN GENETICS
Polyhybrid cross- A breeding experiment dealing with more than two traits at a time.
Inbreeding- Production of offsprings by mating of closely related parents such as cousins.
Outbreeding- Production of offsprings by mating of unrelated parents.
Heterosis or Hybrid vigour- Greater vitality and vigour of the heterozygous individuals produced by outbreeding is called heterosis
BASIC TERMS IN GENETICS Read More »
MEIOSIS-I IN ANIMAL AND PLANT CELL
Zygotene:Pairing of homologous chromosomes takes place known as synapsis, pair of homologous chromosomes is called bivalent. Synaptonemal complex a fibrillar ladder like organelle develop between paired chromosome that stablizes pairing till crossing over takes place. The chromatids are not still visible. Pachytene: Chromatid of each synapse become visible and slightly separate, two chromatid of a chromosome are called dyad & group of 4 homologous chromosome as tetrad. Chromatids of same chromosome are called sister chromatid & chromatids of homologous chromosomes are called non sister chromatids. The exchange of segments of non sisterchromatids takes place in this stage called crossing over that produces . Breaking of segments done by enzyme endonuclease and annealing by ligase
MEIOSIS-I IN ANIMAL AND PLANT CELL Read More »