Explain what vestigial structure are and how they show evidence of evolution

Sputnik 1 was important because it was the first: mission to Mars man-made object launched into space manned expedition into the Challenger Deep submerisble diving machine

What are the tiny air sacks in the lungs called?

How does the crayfish breath

Which phrases describe the atmosphere?

A man with cystic fibrosis of the pancreas wishes to marry a young woman whose family has never had an individual born with the disorder.

A scientist is trying to determine which clade an organism best fits into based on its characteristics. He has determined that the organism must belong to either the clade of bacteria or fungi.

The tiny bodies within cells that supply essential energy for function, growth, and repair are known as:

Henry's economy is classified as a secondary sector economy. Which could be the most important occupation in Henry's country? a. hunting b. retail c. mining d. food processing

Which of the following is not a renewable resource? A. Wind B. Trees C. Corn D. Gasoline

Elizabeth was studying the history of the cell theory and the contributions of different scientists. She made this table to compare two of the scientists.