Land plants are thought to be descendants of which of these groups?

A - green algae

B - red algae

C - brown algae

D - ferns

Write a paragraph as if you are a molecule of ammonia that will be converted to uric acid and then to urea and excreted as urine. Start in the blood and finish as the urine leaves the body.

How are the membranes of many eukaryotic organisms able to remain fluid when the temperature becomes extremely cold?

An uncovered pot of water lies out in the sun. Which statements correctly describe what happens at the surface of the liquid water?

2. What caused the mutation in the top gene?

What is NOT an example of an ecosystem? a. digestive system b. carbon dioxide c. tide pool d. prairie

What type of bond links monomers together to form polymers? using the analogy of a train, if cars represent amino acids, what does the entire train represent?

Differences among individuals of a species are referred to as

J. What differences can you see when you compare the nucleus of a dividing cell with that of a non-dividing cell?

What is the energy of a photon first used to do in photosynthesis?

Select the correct statement regarding chemical synapses. A) Cells with gap junctions use chemical synapses. B) The release of neurotransmitter molecules gives cells the property of being electrically coupled.