Question

How does pollination take place in an angiosperm?

and

Explain double fertilization in angiosperms.

Answer 1

okay u hv any idea about this ?

Answer 2

ummm a little...I was looking thru my textbook and they reproduce by flowering i think

Answer 3

oh and fruit

Answer 4

with seeds in them

Answer 5

yes...flower is the characteristic of angiosperms. Pollination means transfer of pollen grains from anther of the male flower to the stigma of female flower

Answer 6

This transfer is done by use of many agents kike wind, water, insects etc

Answer 7

ok so with angiosperms do the seeds travel randomly via the wind...?

Answer 8

*kike=like

Answer 9

ohhh oops just saw your asnwer

Answer 10

*answer

Answer 11

oh ok cuz bees for example take the pollen and spread it?

Answer 12

seeds are the result of fertilisation...it is like baby

Answer 13

pollination involves pollen grains these are like sperms.

Answer 14

ok makes sense...the seed is formed after it is fertilized...

Answer 15

yes bees come for nectar and unknowingly take the pollen grain and spread it

Answer 16

oh ok...I get it...but what about the double fertilization?

Answer 17

Double fertilization is a complex fertilization mechanism of flowering plants. This process involves the joining of a female gametophyte with two male gametes.

Answer 18

ok but what makes it double...like does it go thru 2 stages or do they split so that two are formed?

Answer 19

actually pollen grains contain two male gametes inside it....it enters the ovule of the flower and fertilises two cells within it...one egg cell and other polar nuclei

Answer 20

the egg cell after fertilisation becomes zygote and polar nuclei becomes PRIMARY ENDOSPERM CELL

Answer 21

r u getting the point ?

Answer 22

ummmm sorta?....

Answer 23

i wonder how u guys have to study double fertilisation in 10th grade..i think its too early..!!

Answer 24

my teacher said it is a very advanced biology (even tho Im just in standard) and they teach a lot more than just a regular bio class

Answer 25

kinda irritating at times!

Answer 26

Hmm..for double fertilisation the basic thing u can keep in memory is that
Pollen carries two cells inside it and fuses with two cells in the ovule thus causes two fertilisation simultaneously and hence called as double fertilisation

Answer 27

Ok that makes sense...basically its only double because there are two cells involved? @Abhisar

Answer 28

actually 4 cells..two in pollen and two in ovule

Answer 29

oh ok...but onces they are done like combining...then its just two?

Answer 30

yes

Answer 31

makes sense!! thank u!!!....ummm....I have another question....

Answer 32

and those two final cells are called as Zygote and Primary Endosperm

Answer 33

yes go ahead

Answer 34

oh thats good to kno! thank u!