plss answer questions no 21....all the parts....
Answers
Ovary- female gamete production takes place in the ovary.
Oviduct- 1)eggs get's fertilised ib the oviduct or fallopian tube.
2) each month an egg is released by each ovary which travels through the oviduct inti the uterus
Uterus- each month uterus prepares itself for recieving and implanting zygote by increasing blood supply and thickens the wall
2)the zygote gets implanted on to the uterus walls.
STRUCTURE OF PLACENTA- It is a disc shaped structure,in uterine walls with villi on the embryonal side and large blood spaces on maternal side.
FUNCTIONS OF PLACENTA -It provides large surface area for glucose and oxygen to pass from mothers blood to embryo
2)it also removes emryonal metabolic waste.
Or
a)UNISEXUAL FLOWERS - PAPAYA AND WATERMELON
BISEXUAL FLOWERS - lily and rose
b)There is the formation of a diploid zygote which firms embryo(future plant)
During sexual reproduction, the reproducing cells or germ cells have half the number (amount) of chromosomes and DNA as compared to somatic or body cells or non-reproducing cells. As the offspring receives one DNA copy from each parent, this complex mechanism helps to maintain the amount of DNA constant in an individual. If the DNA had to get doubled during sexual reproduction, then each generation would have double the amount of DNA content as compared to the previous generation. That is why the amount of DNA does not get doubled during sexual reproduction.
Ispe placenta ka fig. nii h to no de payenge sorry
