One hypothesis about the extinction of dinosaurs is that a meteor hit the earth causing an explosion so powerful that blocked out the sun. consider the model above and explain why would this have caused a mass extinction

Would you expect a mammal to need more or less oxygen than a reptile of the same size? Explain your answer.

Sphagnum moss is adapted to living in acidic conditions with little oxygen true or false

Which of Mendel's Laws of Inheritance states that if an offspring of sexually reproducing parents had the genotype Rr for a particular trait, then that offspring received one of the alleles from each of his or her parents? Mark only one oval.

The major cause of air pollution is: a. industrial waste b. sewage and pesticides c. car exhaust d. radioactive waste

Use the following example for the question. A species of fish can withstand a narrow range of temperature. Above 100°F there are no individuals present. In the range from 97°F-100°F and 90°F-94°F there are a few individuals present.

A species displaying which of the survivorship curves is likely to produce the most offspring?

When comparing dogs to wolves, scientists found evidence that supports the idea they come from a common ancestor.

Riddle: I'm mostly made of water, but that's not all. I fill up the cell, from wall to wall.

The process by which the information contained in RNA is used to build a protein is called replication. synthesis. translation. transcription.

Seedless bananas were probably first caused by a blank