In which structure do monotreme embryos develop? a. a placenta
b. an egg
c. a yolk
d. a pouch

The correct answer is B. Monotreme embryos develop in an egg.

Explanation:

Monotremes are the mammals that, like the platypus, develop in eggs. Thus, this class of mammals is the only one with this condition, which is shared with reptiles and birds.

Monotremes are considered to be animals with a prehistoric development, so this characteristic of being developed in eggs is a condition that originates in the historical period in which these animals emerged.

the most logical answer would be a

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.