1. Tardigrade
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  4. The embryo sac of an angiosperm is made up of

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Q. The embryo sac of an angiosperm is made up of

Plant Kingdom

Solution:

Female gametophyte or embryo sac of angiosperms develops upto $8$-nudeate, $7$-celled prior to fertilisation. There is a three celled apparatus (one egg cell or oosphere and two synergids), three antipodal cells and two polar nuclei. The two polar nuclei fuse to form a diploid secondary nucleus.