Darwin realized that most species produce many more offspring than is necessary to maintain a constant population. What is the fate of the excess of individuals?

The environment of the world is now in great danger due to ________

India is currently the most populous nation on the planet with a population of about 1.4 billion people.

If two individual birds have different coloration but interbreed and produce viable fertile offspring, they are considered to belong to the same species.

If the flow of energy in an Arctic ecosystem goes through a simple food chain from seaweed to fish to seals to polar bears, then which of the following is true?

Which of the following is NOT among the lines of evidence for the idea that evolution has led to the development of modern species?

The oldest fossils are known from about _____ years ago.

During most of the history of mankind the Earth has been viewed as a static non-changing entity. The field of geology changed this perception in the late 18th century by numerous field observations. It was found that all of the following are physical forces that act in small increments to produce major changes on the earth’s surface except for ______

Darwin’s concept of Natural Selection is closest in meaning to ……?

What is the primary source of energy for nearly all of earth’s ecosystems?