Fill in the blank . skeletal muscles are formed by skeletal muscle tissue, and the tissue is made up of skeletal muscle a.)cells; organs b.)organs; cells c.)cells; organ systems d.)organ systems; cells

This aquarium exhibits biotic and abiotic factors in an aquatic environment. one of the abiotic factors is

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

People with one sickle cell allele are not likely to get malaria. what is this an example of?