Describe the structure of the blastocyst
• Structure formed after multiple cell divisions of zygote. • Inner cell mass (ICM) - forms the embryo. • The outer layer - trophoblast. This layer surrounds the inner cell mass and a fluid-filled cavity known as the blastocoele. • The trophoblast gives rise to the placenta.
JC
Related Biology A Level answers
All answers ▸Explain what the stages of protein folding are and how the protein is held in its 3D shape
Explain why the pancreas is described as both an endocrine and an exocrine organ.
Describe how an action potential is carried across a synapse between to neurons.
How does base deletion in the DNA code produce a nonfunctional protein?