"Pollen grain is enclosed by an outer wall called _____ and an inner wall called ______", "Pollen grain is enclosed by <b> exine </b> and <b> intine </b>" "_____ secretes chemical substances to determine compatibility", "<b> Exine </b> secretes chemical substances to determine compatibility" "______ secretes a chemical substance to digest stigma tissue", "<b> Intine </b> secretes a chemical substance to digest stigma tissue" "After pollen landed on stigma, pollen germination occur. Pollen germinates when", "Pollen germinates when the tube cell produces pollen tube" "", "" "As pollen tube elongates down the _____, generative cell divides by mitosis to form _ ____ ______", "As pollen tube elongates down the <b> style </b>, generative cell divides by mitosis to form <b> 2 sperm nuclei</b>" "", "" "The elongating pollen tube will enter ovule through the _________, then tube cell will degenerate, allowing 2 _____ _____ to enter embryo sac", "The pollen tube will enter ovule through the <b> micropyle </b>, then tube cell will degenerate, allowing 2 <b> sperm nuclei </b> to enter embryo sac" "", "" "Embryo sac is female gametophyte that develops inside an _____", "<b> Embryo sac </b> is a female gametophyte that develops inside an <b>ovule</b>" "", "" "Immature male gametophyte is", "Pollen with <i> pollen tube, tube cell </i> and <i><b> generative nucleus</b></i>" "Mature male gametophyte is", "Pollen with <i> pollen tube, tube cell </i>and <i> <b>2 sperm nuclei</b></i>" "The fusion of 2 sperms with different nuclei in embryo sac is called ______ _____________", "The fusion of 2 sperms with different nuclei in embryo sac is called <b> double fertilization</b>" "What is an embryo sac?", "is a <b>female gametophyte</b> with 8 nuclei:<br /> 3 antipodal cells<br /> 2 polar nuclei<br /> 1 egg / ovum<br /> 2 synergids" "", "" "Double fertilization occurs when 1 sperm nucleus fuse with an ____ & to form a diploid ______<br /> And the other 1 sperm nucleus fuse with 2 ____ ____ to form a triploid ________", "<b> 1 sperm </b>nucleus fuse with an <b> egg </b>& to form a<b> diploid zygote </b><br /> And the other <b>1 sperm </b>nucleus fuse with<b> 2 polar nuclei</b> to form a<b> triploid endosperm<br /> </b>" "Egg (n) + sperm (n) = _____ (2n) that develop into _____", "Egg (n) + sperm (n) = <b> zygote (2n) </b>that develop into <b>embryo</b>" "2 Polar nuclei (2n) + sperm (n) = __________(3n)", "2 Polar nuclei (2n) + sperm (n) =<b> endosperm (3n)</b>" "Endosperm acts as a ___ ________ for the seed", "Endosperm acts as a <b>food storing tissue </b> (<i> this ensure endosperm develop only in ovules that egg has been fertilized)<br /> </i>" "Ovules develop into _____", "Ovules develop into <b>seeds<br /> </b>" "Ovary develops into a ______", "Ovary develops into a <b>fruit</b>" "Integuments become the ___ ____", "Integuments become the <b> seed coat </b>"
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