Why do organisms require different levels of cellular organization

Which of the following molecules are used by heterotrophs as primary sources of free energy? A. Proteins, carbohydrates, and nucleic acids B. Carbohydrates, lipids, and proteins C. Nucleic acids, lipids, and carbohydrates D.

What is salinity? what units are used to express the salinity in water?

What is the number one determining factor in the types of organisms that can live in a body of water? temperature density distance from people salinity

The surgical term that means suture of the tongue is:

What was Anton van Leeuwenhoek's contribution in the development of cell theory?

Which of the following statements justifies that meiosis is a reduction division? Meiosis results in the formation of gametes. Meiosis produces recombinant chromosomes. Meiosis begins with a diploid cell, but produces four haploid cells.

When you stub your toe, the information is sent to the brain using:?

When you drink sea water, what type of solution do you expose your cells to? 1. Hypertonic 2. Hypotonic 3. Isotonic

What structural feature on the surface of a plasma membrane allows cells to recognize one another? a. nucleic acids b. integral proteins c. peripheral proteins d. carbohydrates e. phospholipids

Match the fossil type with the fossil description. Match Term Definition Mold fossils A) impressions from very thin objects that were trapped in mud that was transformed into rock Cast fossils B) formed when remains are trapped in tree sap Trace