4 Written questions
3 Multiple choice questions
- they showed that organic molecules such as amino acids could be produced from inorganic molecules
- allows us to indirectly date fossils up to billions of years old based on minerals in surrounding volcanic strata
3 True/False questions
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 → they provide positional information in the embryo
Hox genes are thought to play an important role in the development of different morphologies because _____.
they affect the timing of reproductive development in the organism
they paved the way for the development of multicellular organisms
they affect the order of genes on certain chromosomes
they affect the timing of development in the embryo
they provide positional information in the embryo → the homolog has evolved more slowly in mice.
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