The mammalian primitive streak gives rise to
Ectoderm
Mesoderm
Endoderm
Germ layers
Vestibular glands secrete
The ratio of the nucleus to cytoplasm at the beginning of cleavage is
Which part of ovary in mammals acts as an endocrine gland after ovulation
In embryonic stage RBC develops in
Uterine endometrium, epithelial glands and connective tissue are broken in menstrual phase. This is due to