Can someone explain speciation to me? I've looked it up, but, it isn't making complete sense to me.

2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium

What causes ocean water to be warmer at the equator than farther north? a. Sunlight hits directly so the warmth is more concentrated B. Cold water currents move from the poles to the equator C. Seasonal winds push warm water away from the coasts D.

Two organisms are in the same phylum but not the same class. Another pair of organisms are in the same genus. Which pair has more in common? Why?

Santa's elves are creating treat bags containing a selection of kit kats, reese's cups and almond joys. (a) how many different types of bags can they make containing 8 chocolate bars.

Psychology is considered a science because it uses a systematic method of asking and answering questions. True or false?

What is a vestigial structure? A. A structure that has no use in the organism B. A structure with similar shape but a different use C. A structure that is only in index fossils D. A structure that contains isotopes! apex!

Why is forecasting human population growth more difficult than forecasting population growth in other animals?

You and your physiology instructor are trapped in an overturned ship. To escape, you must swim underwater a long distance. You tell your instructor it would be a good idea to hyperventilate before making the escape attempt.

Thermal vents are found at the bottom of the ocean in the benthic zone.

What is a transitional fossil? what is a transitional fossil? a transitional fossil is in the middle of a direct lineage stretching from ancient forms to organisms alive today. transitional fossils were poorly adapted to their environments.