Starting with 4,000 bacterial cells in a rich nutrient broth and a 20 minutes generation time, how many cells will there be after 2 hours?

Which of the following is NOT evidence for the endosymbiotic theory?

Single-celled eukaryotes lacking a cell wall are …

Which of the following has the highest energy?

Single-celled eukaryotes lacking a cell wall are …

Sex-linked disorders such as red-green color blindness and hemophilia are:

Tay-Sachs is a recessive genetic disease in humans. If one parent is homozygous normal and the other is a carrier (heterozygous), what are the chances that their child will have this disease?

In horses, black coat (B) is dominant over brown coat (b), and being a trotter (T) is dominant over being a pacer (t). A black horse who is a pacer is crossed with a brown horse who is a trotter. The offspring is a brown pacer. What is the genotype of the brown trotter parent?

A woman who can roll her tongue (presumably dominant) is married to a man who cannot. Two of their four children can roll their tongues and two cannot. If A = roll tongue and a = cannot roll tongue, then what are the genotypes of the parents? 

Which of the following is the process by which species not closely related may come to resemble one another if they live in a similar environment: