Examlex
Which sentence is correct?
Gastrulation
A phase early in the embryonic development of most animals, during which the single-layered blastula is reorganized into a multilayered structure known as the gastrula.
Germ Layers
The primary layers of cells in an embryo (ectoderm, mesoderm, and endoderm) from which all tissues and organs develop.
Tubal Ligation
A surgical method of female sterilization involving the cutting, tying, or otherwise blocking of the fallopian tubes to prevent eggs from reaching the uterus.
Withdrawal Method
A form of birth control where the penis is withdrawn from the vagina before ejaculation to prevent sperm from entering the female reproductive tract.
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