Which choice is a chemical messenger that can directly influence gene expression? a. nonsteroid hormone b. steroid hormone c. ATP d. cAMP

What are eubacteria classified by?

Why can mutations in bacteria be a bad thing

The process below is exothermic, so what is true about the bond energies of the reactants and products? 2H2+O2→2H2O a. Bond energy in the reactants is greater than bond energy in the products. B.

What was the purpose of including a quadrant to which no lysozyme was added?

We just reviewed a list of eight characteristics of life. Do any of these characteristics apply to the viruses that cause the common cold? Would you describe viruses as "living organisms"? Why or why not?

When so few members of a species reamin that it can no longer play its role in the biological communities where it is found, the species has undergone?

Describe what type of macromolecule lactose is and what the monomer of the macromolecule is

When Santos stands in a swimming pool and looks at his feet, his legs appear to be bent. Which is the term for this phenomenon? A) diffraction B) dispersion C) reflection D) refraction

What triggers pfiesteria change from a harmless algae feeder to a toxin producing fish killer?

Antibodies are made when animals detect a foreign antigen. All mammals carry albumin in their blood. How was a rabbit antibody against albumin created? Was this lethal to the rabbit? Explain you reasoning.