What is observation?

What is thought to have caused the extinction of the dinosaurs? 1, Ice ages 2. Increase in oxygen 3. Asteroid that hit Earth 4. Rising sea levels

15) More than one billion of Earth's population of nearly 7.3 billion people lack access to safe drinking water. Over 5 million people die each year from waterborne illness due to contaminated water supplies.

Which is taxonomy important? A) Taxonomy allows scientists to analyze DNA and RNA sequences. B) Taxonomy allows a better understanding of relationships among species. C) Taxonomy allows the manipulation of genes for medical purposes.

Name the two types of digestion, and describe how they are similar and different.

How can I use prokaryote in a sentence?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.