4 Written questions
3 Multiple choice questions
- Ivy leaf and pine needle
- The term "monophyletic" refers to a taxon that includes an ancestral species and all of its descendants.
3 True/False questions
The relative lengths of the frog and mouse branches in the phylogeny in Figure 26.13 in your textbook indicate that
frogs evolved before mice.
the genes of frogs and mice have only coincidental homoplasies.
the homolog has evolved more slowly in mice.
the homolog has evolved more rapidly in mice.
mice evolved before frogs. → they provide positional information in the embryo
Miller and Urey's experiments that attempted to recreate conditions on early Earth were significant because _____.
they showed how polymers could form spontaneously on a clay substrate
they showed that organic molecules such as amino acids could be produced from inorganic molecules
they showed how radiometric dating could be used to give the absolute ages of rocks and fossils
proved the endosymbiotic theory
they produced the first protocells → RNA has both information storage and catalytic properties.
Radiometric dating _____.
allows us to determine an absolute, errorless date
only works on rocks younger than 75,000 years
allows us to indirectly date fossils up to billions of years old based on minerals in surrounding volcanic strata
relies on the fact that the daughter isotope decays to the parent isotope at a constant rate
can be used to directly date fossils in sedimentary rock → "tinkering" with existing structures