The human embryo and all other vertebrate embryos have gill slits this beat support the following A. Fish are humans closest relatives

B. Fish are in the same genus as man

C. All vertebrates are related

D. The embryo breathes uderwater

If you have a difficult time knowing where your hand is without looking at it you may be having a problem with your what ?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?