Why were dams built in the early 20th century?

Which of the following best describes why polar bears are a sub-species of brown bears instead of a completely separate species? A. Because they both have thick fur and 4 legs, so they are very similar B.

High air pressure means that the air is (blank A.) and (blank B.). Choices for (blank A). 1. lighter 2. higher 3. nearer 4. colder Choices for (blank B.) 1. further 2. warmer 3. lighter 4. heavier

How do industrial melanism, insecticide resistance, and antibiotic resistance all support the idea of evolution and natural selection?

As part of a community-service project, a local club has decided to paint 864 walls across town. The club has 36 volunteers. If the work is divided evenly, how many walls must each volunteer paint? 24 29 34 39

In a cell that is not dividing, the unwound, filamented mass of dna and associated proteins is called

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.