What changes are observed in the uterus subsequent to implantation of young embryo?
What changes are observed in the uterus if fertilisation does not occur?
Trace the path of sperm during ejaculation and mention the gland and their functions associated with the male reproductive system.
Reproduction is linked to stability of population of a species. Justify the statement.
Is the chromosome number of zygote, embryonal cells and adult of a particular organism always constant? How is the constancy maintained in these three stages?
Why cannot fertilisation take place in flowers if pollination does not occur?
In tobacco plant, the male gametes have twenty four chromosomes. What is the number of chromosomes in the female gamete? What is the number of chromosomes in the zygote?
From the internet, gather information about the chromosome numbers of five animals and five plants. Correlate the number with the size of organism and answer the following questions.
(a) Do larger organisms have more number of chromosomes/cells?
(b) Can organism with fewer chromosomes reproduce more easily than organisms with more number of chromosomes?
(c) More the number of chromosomes/cells greater is the DNA content. Justify.
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