In 1533, Portuguese sailors released goats to graze on the grasses on the island of St. Helena in the South Atlantic in order to serve as a food source for sailors on passing ships. A few years later goats were plentiful, but many of the native plants and animals no longer inhabited the island. Which of the following is the most likely cause for the disappearance of the plants and animals?

Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.

What must be done to breed dogs for a partical trait