Muscle cells are full of protein fibers, so they must have this organelle to make the fibers. A. nuclei
B. mitochondria
C. ribosomes
D. membranes

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

b. heterotroph

explanation:

the man is bald so he has no hair to get wet

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: