How many times a day does the water rise and fall to produce tides?

•once

•twice

•three times

•four times

Why are the auscultatory sounds of heart not the same as location of valves

3 types of rna and how they involved in protein synthesis

Two species of animal are very similar in appearance. The first species gives birth to offspring that have no hair. Their eyes are also closed. The second species gives birth to offspring that have a full coat of hair. Their eyes are also open.

A genetic tendency toward efficient use of energy that results in below-average energy requirements and increased storage of calories as fat is called

What is histones in dna used

The mitral valve is in between which two chambers of the heart?

Sanjay and his family want to cut back on their use of non-renewable resources at home. They are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment.

What does spermatogenesis produce from one original cell.

Artificial Selection Section Cathy read about whales and learned that the average length of a blue whale is 80 feet. She also read that they can grow to be 94 feet long. Cathy wondered if the length of the blue whale is genetic.

What is an element of calcium?