You find a four-legged animal on the shore of a pond. It has a backbone, and can breathe through its skin, but also has lungs. Its eggs are thin, lacking an amnion, and must be laid in the water. This organism is…

For any given ecosystem, which of the following trophic levels would take in the most TOTAL energy over the course of a year?

Which of the following best distinguishes algae from protozoa?

In a eukaryotic cell, inside which organelle does DNA get transcribed into RNA?

You put a membrane in a container of water, then put some solute on each side. You put more solute on the left than on the right. In this diagram, solute is shown as black dots:                                             This diagram shows the STARTING state of the container, before any movement has occurred. Which one of the following statements is TRUE?

A cell contains a molecule called Testase. Testase speeds up a reaction that breaks a different molecule, called Targetose, into two smaller pieces. The process releases energy. Targetose -> Piece A + Piece B Which statement is TRUE?

Which one of the following would you NOT expect to find in a prokaryotic bacterium?

Which of the following would be most likely to lead to ALLOPATRIC speciation?

How do nitrogen and phosphate pollution cause eutrophication in lakes and streams?

Zofran is an anti-emetic.