What is expressed when both alleles for a gene are equally expressed as in human blood type?

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

How and why organisms are hierarchically classifies