What four molecules is dna?

What would happen if algae, cyanobacteria, and plants were wiped out?

With aging the skin becomes thinner and more fragile. the thinning of the skin's subcutaneous fat layer makes older adults more sensitive to:

In humans, the process of meiosis and the fertilization of the egg and the sperm ensures that the same offspring will never be created twice. Explain the three events during meiosis/fertilization that make this possible.

2. When you decrease the pH in the simulation, the ocean's acidity increases. What do you expect to happen over time to the population of the corals, algae, and fish in the coral reef as the pH of the ocean decreases?

When a few drops of hydrogen peroxide are added to a living tissue such as liver or kidney, fizzing or foaming occurs immediately. Briefly explain the observation

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