[Bio 210B] Exam #1 (Solved)

What is biodiversity? correct answers the diversity of life What are the three levels of biodiversity? correct answers genetic diversity, species diversity, and ecosystem diversity What are the major benefits of biodiversity to our species? correct answers plants are a great benefactor for medicine (sources for pharmaceutical and other chemicals), as well as providing oxygen to the environment pollinators (like the fruit-fly bat are beneficial for spreading, or dispersing pollen) bacteria is essential to bioengineering (PCR amplification, creating new protein, etc.) How has our species impacted biodiversity? correct answers our species has impacted biodiversity by overexploitation/overharvesting, introducing species (to foreign environments that compete with the other species already residing there), habitat loss/deforestation, global change What is the evidence for evolution? correct answers fossil records comparative morphology (species that descended from a common ancestor have homologous structures. Although, a human, cat, whale, and bat all have the same structure, but have evolved in a way where their structure has changed in relation to their function) comparative embryology (post anal tail, pharyngeal pouches etc.) comparative molecular biology artificial selection Vestigial organ correct answers an organ that you don't use much anymore, so it gets reduced in size. i.e. for humans, the spinal cord tail Artificial selection correct answers manipulating the change of alleles to bring rise to diversity What is divergent evolution? Convergent evolution? correct answers divergent evolution: splitting of lineages, which results in the formation of new species