What percentage of animals on earth are vertebrates? a)5% b)25% c)50% d)95% a) is the correct answer, insects, arachnids, sponges, echinoderms, cnidarians, etc. are all invertebrates, constituting ~95-97% of all animal species. therefore, only about 3-5% of all animal species are vertebrates.

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

Which step is not included in the step approach to calculating the greatest common divisor?