Plz help me plz

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.

Some substances but not other can cross the (blank) membrane of a cell

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.