Caused by natural sources, such as dus and smoke, and human sources, such as gas powered cars and trucks

What makes mitochondrial DNA useful as a molecular clock? A) It is only found in select organisms, making it easier to compare relationships between species that have it.

Could Elodea from a freshwater lake be expected to survive if transplanted into the ocean?

Mark argues that proteins within the body have two functions: structure and transport. Sara disagrees. Which significant function of proteins did Mark omit from his list?

What cell is has Special vesicles containing enzymes

Which of the following statements is true about the distribution and storage process for natural gas? A. Natural gas cannot be liquefied and transported into tanks. B. Natural gas is most often stored above ground after refining. C.

What might happen if you changed one nucleotide in a codon?

Oxygen weathers rock through a process called

The table below compares the distances between two astronomical bodies and two cities on Earth. Distances in Space and on Earth Bodies/Locations Distance A and B 440 billion km C and D 8,000 km Based on the table, which of the following statements

Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. There are few cells in the body that do not undergo mitosis: most somatic cells divide regularly, some more than others.

How is the role of the nucleus in a cell similar to the role of a captain on a sports team