music: Category: Musical V: New age Swedish Harp monster?

Questions

Catnip can affect lions and tigers as well as house cats. It excites them because it contains a chemical that resembles an excretion of the dominant female's ----------?

The hum of a hummingbird comes from the super-fast beat of the wings. The smallest ones beat their wings the fastest - up to 80 times per second. Even the slower beat of bigger hummingbirds (20 times per second) is so fast you can only see a ----------?

The basenji is a mid-sized dog with a silky copper coat. Although they are considered a barkless dog, they are known to ---------- when they are happy.?

Octopi and squid have ---------- hearts. Their main systemic heart pumps blood throughout the circulatory system, and two branchial hearts provide some additional push at each of the paired gills.?

Hens do not have to be impregnated to lay eggs. The ---------- is necessary only to fertilize the egg.?