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Answer:
All plants need flowers to sexually reproduce:
Flowering plants, the angiosperms, were the last of the seed plant groups to evolve, appearing over 100 million years ago during the middle of the Age of Dinosaurs (late Jurassic). All flowering plants produce flowers and if they are sexually reproductive, they produce a diploid zygote and triploid endosperm.
Sexually reproduced offspring are identical to their parents:
Asexual reproduction generates offspring that are genetically identical to a single parent. In sexual reproduction, two parents contribute genetic information to produce unique offspring. Sexual and asexual reproduction have advantages and disadvantages—which is why some organisms do both!
Fertilization always occurs inside the female's body:
Fertilization occurs in the fallopian tubes
Fertilization takes place in the fallopian tubes, which connect the ovaries to the uterus. Fertilization happens when a sperm cell successfully meets an egg cell in the fallopian tube. Once fertilization takes place, this newly fertilized cell is called a zygote.
A body cell has twice the number of chromosomes as an egg cell:
The only exception is cells in the germ line, which go on to produce gametes, or egg and sperm cells. ... The total number of chromosomes in diploid cells is described as 2n, which is twice the number of chromosomes in a haploid cell (n).