How do we know the frequency of a wave when we can't see it?

How many neutrons does element x have if its atomic number is 39 and its mass number is 84?

Is the relationship between genotype and phenotype always the same for different kinds of traits

Mutations within an organism can occur in body cells or reproductive cells. Which type of mutation is seen in a sperm cell but not in a skin cell? comatic mutation

What is the difference between earthquake magnitude and intensity

How is artificial; selection dependent on variation in nature?

When the skydiver jumps of the plane what force acts on her that causes her to fall

Match the geologic feature with its description. 1. seamount over 1 mile in diameter; looks like a bowl over a volcano 2. syncline underwater volcano that never reaches above sea level 3. hot spring on rolling hills, this a dip between hills 4.

What is free nitrogen? 8 nitrogen that is ready for plants to use nitrogen that has been fixed by bacteria nitrogen that cannot be used by organisms nitrogen that is returned to the soil by decomposers

Which of the following does NOT represent an adaptation that would lead an organism to be successful? A. A wolf in a cold environment growing a thicker coat of fur. B. A caged chicken developing a longer wingspan. C.

What are the 3 things plants must be able to do