Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

In pea plants, the allele for wrinkled seeds (r) is recessive to the allele for round seeds (R). A population that is in Hardy-Weinberg equilibrium has an allele frequency of r = 0.4.

Genomic libraries can be constructed using bacterial plasmids or what other vector?

What molecules occur during fermentation

The human GM-CSF gene and the mouse GM-CSF gene vary by more than 60% in their DNA sequence. However, when scientists place the human gene into mice, it functions properly. What best explains why this happens?

If a child receives an X chromosome from the mother and a Y chromosome from its father. What is true about this child

8. List at least 5 new discoveries about viruses.

The phospholipid molecule has two parts, the polar end and the bipolar end. True or False?

Giraffes use their extremely long necks to reach the lees high up on a case he had trees which other animals can not reach giving them a food source for which they have few competitors what can you conclude about natural selection from this

Which is a reason that many organisms that have existed on earth have left no fossils?

Are all organisms with similar physical characteristics related to one another? If not, why?