Minerals are classified according to their what? 1) density 2) size 3) composition 4) color

Ricardo listed characteristics of three types of fungi in a chart. Which headings correctly complete the chart?

Which group of reptiles has the most advanced circulatory system? A.) Turtles B.) Squamata C.) Tuatara D.) Crocodilians

What is the selection pressure for dinosaurs evolving into birds?

In the systemic circulation, what kind of blood vessel carries blood from the body back to heart? arteries valves veins arterioles

In the Galapagos islands, the weather causes a variation in algae growth year to year. Marine iguanas eat the algae, and during the years with more algae growth, the marine iguanas lay more eggs.

Which Scientists Gave Cells their name while observing cork under a microscope

What. System rid the body of carbon dioxide?

What is the process of mountain building called

Sexual reproduction is the reproductive process that 1) keeps species from changing. 2) produces identical offspring. 3) causes mutations. 4) creates genetic variety.

About half of the forests that covered the earth in the early 1900s have been cut down. Discuss the impact this has on carbon dioxide levels in the atmosphere. Support your answer.