Misc: this german composed the famous opera, die walkure?

Questions

The normal body temperature of the ---------- horse is 101 degrees Fahrenheit (38 degrees Celsius).?

The electric eel has thousands of electric cells running up and down its tail. Vital body organs, such as the heart, are packed into a small space behind the head. They use their electric sense to "see". Their electric sensors act like ----------. They send out weak impulses which bounce off objects.?

Since housecats are clean and their coats are dry and glossy, their fur easily becomes charged with ----------?

There are seven distinctive types of combs on ----------: rose, strawberry, single, cushion, buttercup, pea, and V-shaped.?

The now-extinct ancestor of the horse, ----------, had a short neck, a pug muzzle, and stood no higher than a medium-sized dog.?