Using the 10% rule when studying trophic pyramids if the primary consumers obtain 100 joules of energy from the autotrophs how much energy is passed on to the carnivores?
a. 1 joule
b. 0.1 joule
c. 10 joules

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

If bacteria are much too small to see, what is one reason why can we see colonies in the petri dishes that have plenty of food to eat after only a few days?

According to the cladogram, which organisms have roundworms as a common ancestor?