Nutrients and oxygen are transferred from a mother to her developing fetus through what?

Placenta

Explanation:

Placenta is the connection between the mother and developing foetus. It secretes hCG hormone. The developing foetus gets nourishment from the mother's body by placenta.

It is a temporary endocrine gland and cut after the child birth. This supplies blood, oxygen to the embryo by the process of diffusion. Placenta also acts as the excretory organ for the developing foetus.

Placenta are formed from the finger like projection of blastocyst called trophoblast.  The one trophoblast forms placenta while others helps in holing the foetus in the mother's womb.

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg