As the population and development in an area increases, so does the threat of air pollution. An increase in cars and factories, coupled with a decrease in vegetation lead to a drop in the quality of the air in the area.

Definition of life:?

During the Ordovician period, it is believed that the sea levels dropped due to the movement of the continents. This event led to the extinction of over 50 percent of all life on earth. This event occurred about A) 5 billion years ago.

What does the smooth endoplasmic reticulum specialize on producing? A) DNA B) RNA C) Proteins D) Steroids E) Toxins

Does RNA contain a phosphate group

Should the United States destroy national parks in order to obtain energy resources that are available?

Describe at least 3 reasons that Earths atmosphere is so important to life on Earth

4. Which statement is true of both mitosis and meiosis? Both occur only in reproductive cells. DNA replication occurs before the division of the nucleus. Both are involved in asexual reproduction. The number of chromosomes is reduced by half. 5.

What is the set of steps used to collect information to test a hypothesis called?

W X Urine is carried from the kidneys to the urinary bladder. Urine is temporarily stored before it is released. Y Z Waste products are filtered through nephrons. Urine is carried from the urinary bladder and released outside the body.

Which molecule is incorrectly matched with its monomer? a. nucleic acids; nucleotide b. protein; amino acid c. starch; lipid