How do reproductive isolation mechanisms contribute to biodiversity?
By allowing populations to diverge into distinct species
Why stromatolites are important?
Because they show evidence of early photosynthetic life.
What do you call the diagram that shows evolutionary relationships based on shared traits?
Phylogenetic tree
Whales and hippos share many genetic similarities compared to other mammals. What does this most strongly indicate about their relationship?
They descended from a recent common ancestor
What was the first commercially approved genetically modified crop?
Flavr Savr tomato
Two species have similar bone structures but very
different DNA sequences. This suggests that their similarity is likely due to?
Analogy
Which naturalist proposed one of the earliest formal theories suggesting species change over time?
Jean-Baptiste Lamarck
When chromosomes exchange segments during meiosis, what mechanism of evolution does it suggest?
Recombination
Why is land considered an unlikely place for the origin of life?
Because of strong UV rays and lack of oxygen
Two frog species mate and produce embryos, but the embryos fail to develop and die early. This postzygotic barrier is called?
Hybrid inviability
Which Paleozoic period is most closely associated with the rapid diversification of animal life?
Cambrian
If you want to design a transgenic crop that is drought-resistant and nutritious, what genetic engineering process approach would you combine?
Transformation + gene cloning + backcross breeding
. A flood drastically reduces the size of a small island population, changing allele frequencies. This situation BEST illustrates what mechanism of evolution?
Genetic drift
Bt cotton contains a gene from Bacillus thuringiensis. What trait does this give the cotton?
Pest resistance
Cite all evidences of evolution discussed.
Fossil record, Comparative Anatomy, Comparative Embryology, Molecular Biology, Biogeography
In the Miller–Urey experiment, what did Flask B represent?
Primitive Atmosphere
Which piece of evidence would best help scientists determine whether a trait reflects common ancestry rather than convergent evolution?
DNA sequence similarities
In what era do reptiles replaced amphibians as dominant vertebrates?
Mesozoic era