What is the function of the retrocerebral organ?

Asap! how does the distance between two objects affect the force of gravity? how is the moon dependent on the sun?

What feature of cell theory is best demonstrated in the image

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.