The picture above shows the early embryos of a human and a chicken. Gill slits and tails are shown in both. What does this most likely suggest?

Providing immunity by injecting the body with a weakened form a pathogen is known as

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

Which of the following is the function of the nociceptors? a. detecting odors in the nose b. detecting painful stimuli c. detecting central body temperature d. detecting touch and pressure