Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in its web. Later that day, a bird eats the spider. How many consumers has Kevin observed directly in this scenario?

If there were no decomposers, which of the following would most likely happen?

Which layer of Earth acts as a very effective "insulator," because it's made of rock?

The unit for density is a derived unit. True False

For what purpose is DNA fingerprinting used?

Which of the following activities is an environmentally responsible use of power? A) leaving your TV on when you are not home B) run your furnace at 72 °F year round C) drying your clothes on an outdoor clothing line D) leaving the refrigerator door

How many kilometers has the left side of the pacific basin spread in 2 million years

What is the role of beta phenylethyl alcohol in pea and how does it work?

Drag the correct description under each cell structure to identify the role it plays in the cell. converts chemical fuel into packets of chemical energy (atp) that can power the cell strong, protective structure made from cellulose fibrils makes

What is the 3rd trophic level called

Roberto is a teenager who is going out with friends to a movie. On the way back home, they decide to stop to grab some food. Roberto is health conscious. What kind of snack would you suggest? A. low protein B. calcium rich C. high calorie D.