The part of the seed that contains stored food for the embryo is the: MCQ with Answer and Explanation

Explanation:
In angiosperms, one sperm fertilizes the egg (zygote) and the other fuses with two polar nuclei (triploid endosperm). This double fertilization is unique.

Explanation:
Down syndrome, the most common chromosomal aneuploidy, is caused by an extra copy of chromosome 21 (trisomy 21), usually from nondisjunction during meiosis. It is characterized by intellectual disability, distinct facial features, and increased risk of certain medical conditions. Monosomy X is Turner syndrome.

Explanation:
Plasmids have an origin of replication, making them effective cloning vectors. Restriction enzymes cut DNA, tissue culture produces clones, Bt cotton targets specific insects.