Why is so little of earth's water available for human use?

German cockroaches, bulging eyes, bu, are recessive to normal eyes, bu , and curved wings, cv, are recessive to straight wings, cv . both traits are encoded by autosomal genes that are linked. a cockroach has genotype bu bu cv cv, and the genes are in repulsion. which set of genes will be found in the most common gametes produced by this cockroach?

Wich organism obtains its energy from dead or decaying matter

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity