Darwin collected and studied many specimens to understand natural selection on the Galapagos Islands. Which organisms did he study while he was there?

During a spring tide, which phases could the Moon be in? Select all that apply. A. full B. new C. first quarter D. third quarter

Explain how current and oxygen content affect the biodiversity of streams and rivers

What is spontaneous generation and why is it important to the history of cell theory?

Explain the process of meiosis with your own words as complete as you can.

A middle age star that burns hydrogen is a A. Main sequence star B. Neutron star C. White dwarf D. Pulsar

Some species of wasps are social. The queen starts a colony from scratch each spring. She builds a small nest, and lays and raises a group of female workers. The workers enlarge the nest while the queen continues to lay eggs.

Students at a university were split into two groups and each received a different text for a philosophy course.

What is the function of the throat in fish?

Which of the following is directly caused by gravity

Anna is a morally rigorous person who demands that her daughter remain a virgin until she is married. Anna cannot remember her own premarital sexual encounters. Which defense mechanism would likely account for this memory lapse?