Solution:
The placenta performs myriad functions to support fetal development, including facilitating blood flow, gas exchange, waste elimination, and serving as a protective barrier for the fetus against any infections the mother experiences during pregnancy.

Solution:
Proteins serve as antibodies.

Solution:
Photosynthesis is a process which is reductive, endergonic and anabolic.

Solution:
The tissue which allows aquatic plants to float is Aerenchyma. Basically aerenchyma is parenchyma tissue in aquatic plants. The cells of aerenchyma make a network which has wide air spaces or air cavities for gaseous exchange. These air cavities make the plant light and buoyant and hence, plants can float easily in water.

Solution:
The seeds which contain abundant glyoxysomes are germinating seeds.

Solution:
The number pyrenoids in Chlamydomonas is 1.

Solution:
The wall of the heart consists of three layers: the epicardium (external layer), the myocardium (middle layer) and the endocardium (inner layer).