What percent of the air is nitrogen?

What part of a dolphin is homologous to the structures found in a bat wing?

Why are estuaries such rich habitats for organisms

The genetic makeup of an individual is called the what phenotype genotype DNA structure characteristics

A newborn with a cleft lip and palate is born to a mother who has a history of epilepsy. Which drug might be responsible for this malformation

What is the best definition of an element? a. an element is a substance that cannot be broken down. b. an element is a positively charged particle. c. an element is a substance only found in stars.

How does the mass of an object affect its a its acceleration during free fall

The speed of a sound wave a. is slower than an electromagnetic wave b. is faster than an electromagnetic wave c. is equal to an electromagnetic wave d. cannot be measured

Inner membrane of mitochondria evolved from

What would most likely happen to life on Earth if the carbon cycle stopped? Life would continue unchanged. Life would conse to exist. Only plants would be affected. Only animals would be affected.

Based on the pattern of nutrition, all animals are classified as?