23 Evan is testing whether the environmental conditions effect the speed that a certain species of protist will reproduce. He shared his procedures and outcomes with a fellow scientist. What is he practicing? A. Repetition, Evan is having another person repeat his process to verify his findings. B. Repetition, Evan is repeating his experiment to verify his process. C. Replication, Evan is having another person repeat his process to verify his findings. D. Replication, Evan is repeating his experiment to verify his process.​

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.