Aspecies of fish is unintentionally introduced into a marine ecosystem. the species has a similar diet to an existing fish species, creating competition for food. according to darwin's theory of evolution by natural selection, which of the following must occur for the existing species to evolve

Which of these is the most likely consequence of falling petroleum price

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.

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only