Which is the primary consumer in this food chain?1. grass 2. rabbit 3. snake 4. hawk

Scientists can determine the size of DNA fragments through a process known as gel electrophoresis. In this process, DNA is loaded into a gel submerged in a liquid solution through which an electric current is run.

How many people are added to the world population each year? 10 million 60 million 20 million 70 million

When Jenner developed the first vaccine he was using the observation of milk maids who]

Different kinds of tissues that work together to perform a certain function are called organs muscles cells

An animal without a body cavity is called A. atypical B. acentric C. acoelomic D. asymmetrical

Transport of materials into a cell against a concentration gradient, from low to high, requires A) water. B) energy. Eliminate C) osmosis. D) a passageway.

As ocean water in a tide pool warms and evaporates, the remaining water becomes a. cooler. b. saltier. c. calmer. d. darker.

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?