BSC 1101 (Chapter 25)

cause iron in ocean water and terrestrial rocks to rust (oxidize) Submit

An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to _____.

permitted the evolution of novel forms

The duplication of homeotic (Hox) genes has been significant in the evolution of animals because it _____.

in particular environments, similar adaptations can be beneficial to more than one species

The existence of evolutionary trends, such as increasing body sizes among horse species, is evidence that _____.

self-replicating RNA molecules

The first genetic material on Earth was probably ________.

the evolution of cellular respiration, which used oxygen to help harvest energy from organic molecules Submit

The oxygen revolution changed Earth's environment dramatically. Which of the following took advantage of the presence of free oxygen in the oceans and atmosphere?

a variety of empty ecological niches, leading to adaptive radiation

Upon being formed, oceanic islands, such as the Hawaiian Islands, should feature what characteristic, leading to which phenomenon?

4, 1, 3, 2, 5

What is thought to be the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth? 1. origin of mitochondria 2. origin of multicellular eukaryotes 3. origin of chloroplasts 4. origin of cyanobacteria 5. origin of fungal-plant symbioses

It includes transitional forms with progressively specialized teeth.

What is true of the fossil record of mammalian origins?

Cambrian, Devonian, Permian, Cretaceous

Which listing of geological periods is in the correct order, from oldest to most recent?

Evolution is limited by historical constraints.

Which of the following is a limit of evolution that results in exaptations?