4 Written questions
3 Multiple choice questions
- The term "monophyletic" refers to a taxon that includes an ancestral species and all of its descendants.
- they provide positional information in the embryo
- RNA has both information storage and catalytic properties.
3 True/False questions
Which of these are homologous structures?
There are no homologous plant structures.
Ivy leaf and pine needle
Plant root and plant leaf → Ivy leaf and pine needle
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 → they showed that organic molecules such as amino acids could be produced from inorganic molecules
Earth probably formed _____ years ago, and the first life evolved as early as _____ years ago.
4.5 billion years ago ... 3.9 billion years ago
Humans observed neither event, so there is no way to tell.
6,000 years ago ... 6,000 years ago
3.9 million years ago ... 2.0 billion years ago
10 billion years ago ... 4.5 billion years ago → 4.5 billion years ago ... 3.9 billion years ago