If the reproductive isolation between two species is complete, they cannot produce viable offspring. There is not enough information to determine if they did or didn't have a recent common ancestor
The answer is ring-like.
Clams have ganglia that form a ring around esophagus and that is why this network is called ring-like.
E- the sun and moon are at right angles to one another
Chlorophyll is typically packed into stacks of membranes (called grana); it is in the grana where some of the sunlight is absorbed. Sunlight is converted to chemical energy in the form of ATP (adenosine triphosphate), which is the main energy-storing molecule in living organisms. Found on the internet