What is an effect of adaptive radiation?

What are some descriptions of echinodermata?

Which of the following would be considered a source of error in an expriment

Acid precipitation lowered the pH of the soil in a terrestrial ecosystem that supported a diverse community of plants and animals. The decrease in pH eliminated all nitrogen-fixing bacteria populations in the area.

Aristotle__ A believed the Earth was flat B suggested the Earth's shape was changing slowly over time C used calculations to suggest the Earth was not a perfect sphere D used eclipse shadows to show the Earth's round shape

1 What is the difference between a habitat and a community?

How does the structure of a cell membrane affect its permeability?

3. Carbon, nitrogen, and water are all important Earth?

What are sex-linked traits? a. traits that determine the sex of offspring b. traits that are common to both sexes c. traits that are carried on the X or Y chromosome

Which statement about roots is true? Select one of the options below as your answer: a. The radicle develops into the primary root. Secondary roots develop from the primary root. b. The radicle develops into the secondary root.

Which two structures are involved in energy production on the cellular level? A. chloroplasts and mitochondria B. mitochondria and Golgi bodies C. Golgi bodies and chloroplasts D. microtubules and mitochondria