Which of the following variables present in redi's experiment on spontaneous generation is not a
controlled variable?
a. gauze covering that keeps flies away from meat
b. types of jars used
c. types of meat used
d. temperature at which the jars were stored

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna.b) they study alleles that contain genes, which are chromosomes.c) they study chromosomes that contain genes, which are dna segments.

Sickle cell amelia is a condition condition where the red blood cells are deformed which is affected by sickle cell amenia