Which statement is true about prokaryotic cells?

O A

They contain a nucleus.

OB They contain a single circular DNA molecule.

O c They lack ribosomes.

D D They usually lack cell walls.

When glucose is being used up and not replaced from food intake, the blood sugar level can be maintained by synthesizing it from smaller molecules such as pyruvate or lactate. this process is called gluconeogenesis.

Water is taken into the body of bivalves through tubes called

Al of the following are light colored fish except a. swordfish b. catfish c. sole d. shrimp

The larvae of the gooseneck barnacle and brine shrimp display similar morphological features despite differences observed in the adult forms. the similarities present in the larval forms suggests that:

Name the phases of the moon in the correct order starting with new moon

A narrow strip of land connecting two larger land bodies is known as a (n: a. peninsula b. bridgeland c. spine d. archipelago e. isthmus

What are fat soluble signalmolecules that are derived from cholesterol?

A wealthy businessman uses modern DNA technology to bring dinosaurs back from extinction. He breeds many varieties of dinosaurs and plans to open a theme park where visitors can see them.

If a DNA sample contains 25 percent adenine (A), what percent of thymine, cytosine, and guanine must it contain? Use Chargaff's rule to construct your answer

What is a population?