Which ecological principle is best illustrated by the diagram below?
(1) In an ecosystem, material is cycled among
the organisms and the environment.
(2) In an ecosystem, the number of producers
and consumers is equal.
(3) Competition within a species results in
natural selection.
(4) An ecosystem requires a constant source of
energy.

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?

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms