The zygote needs nourishment during its development. As the mature, fertilised embryo sac offers very little nourishment to the zygote, the PEC divides and generates the endosperm tissue which nourishes the zygote. Hence, the zygote always divides after division of PEC.
The zygote needs nourishment during its development. As the mature, fertilised embryo sac offers very little nourishment to the zygote, the PEC divides and generates the endosperm tissue which nourishes the zygote.
Hence, the zygote always divides after division of PEC.
Reduction division (meiosis) is associated with sexual reproduction. The reasons for this are: a. Since sexual reproduction involves the fusion of two types of gametes (male and female), they must have haploid number of chromosomes. b. The cell (meiocyte) which gives rise to gametes often has diploiRead more
Reduction division (meiosis) is associated with sexual reproduction. The reasons for this are:
a. Since sexual reproduction involves the fusion of two types of gametes (male and female), they must have haploid number of chromosomes.
b. The cell (meiocyte) which gives rise to gametes often has diploid number of chromosomes and it is only by reducing the number by half that we can get haploid gametes.
c. Reduction division also ensures maintenance of constancy of chromosome number from generation to generation.
Why does the zygote begin to divide only after the division of primary endosperm cell?
The zygote needs nourishment during its development. As the mature, fertilised embryo sac offers very little nourishment to the zygote, the PEC divides and generates the endosperm tissue which nourishes the zygote. Hence, the zygote always divides after division of PEC.
The zygote needs nourishment during its development. As the mature, fertilised embryo sac offers very little nourishment to the zygote, the PEC divides and generates the endosperm tissue which nourishes the zygote.
See lessHence, the zygote always divides after division of PEC.
With which type of reproduction do we associate the reduction division? Analyse the reasons for it.
Reduction division (meiosis) is associated with sexual reproduction. The reasons for this are: a. Since sexual reproduction involves the fusion of two types of gametes (male and female), they must have haploid number of chromosomes. b. The cell (meiocyte) which gives rise to gametes often has diploiRead more
Reduction division (meiosis) is associated with sexual reproduction. The reasons for this are:
See lessa. Since sexual reproduction involves the fusion of two types of gametes (male and female), they must have haploid number of chromosomes.
b. The cell (meiocyte) which gives rise to gametes often has diploid number of chromosomes and it is only by reducing the number by half that we can get haploid gametes.
c. Reduction division also ensures maintenance of constancy of chromosome number from generation to generation.
In haploid organisms that undergo sexual reproduction, name the stage in the life cycle when meiosis occurs. Give reasons for your answer.
Meiosis takes place duxing is post-zygotic stage. Since the organism is hapoid, meiosis cannot occur during gametogenesis.
Meiosis takes place duxing is post-zygotic stage. Since the organism is hapoid, meiosis cannot occur during gametogenesis.
See lessWhat is the raw material for polyblend?
Plastic waste.
Plastic waste.
See lessName the city in which the entire public road transport runs on CNG.
Delhi.
Delhi.
See less