Which of the following is a nitrogenous base?

A) ribose

B) guanine

C) enzyme

D) cysteine

An engineer is building an electronic device. She wants to use a material that will give her the most control over the amount of electric charge that flows through a circuit.

The combined alleles of all the individuals in a population are called the?

Stefan is writing a report about the law of reflection. In his report, he says that the angle of incidence is the angle between the surface of the mirror and the incoming ray. Do you agree with him? Why or why not?

During dna replication in a human cell, 6 billions bases must be paired properly. which characteristic of dna best allows for high level of accuracy during this process

Is the correlation between morbid obesity and cardiovascular disease strong?

About 10% of women experience severe pain at the entrance of the vagina. this is known as

Which of the following correctly describes homeostasis in protists? (A) Paramecium maintain homeostasis by swelling and bursting (B) Vacuoles allow water to enter and exit the paramecium (C) Flagella allow paramecia to move through a substance (D)

List 4 observations that indicate that a chemical reaction may be taking place

Which statement describes the light reaction of photosynthesis? A. Water molecules are combined to make food. B. Air and water create energy for a plant. C. Carbon dioxide is put together with glucose. D. Water molecules are split apart.

4. Where are the two places we find receptor proteins? Inside the target cell, target cell plasma membrane Signaling cell plasma membrane, inside the target cell Signaling cell plasma membrane, ligand Target cell plasma membrane, signaling cell