Blog

In New Mexico, large expanses of black lava create patches of unique habitat. If, in every generation, selection favors the darkest-colored pocket mice in those habitats because they are best hidden from predators, this would be an example of ________.

Some forms of diabetes and arthritis are examples of ________.

You are looking at a muscle cell and analyzing the events that lead to muscle contraction. You find that there is a pump called the sodium potassium ATPase that will pump potassium into cells while also pumping sodium out of cells both against their concentration gradients. You think for a second and realize that this process is very similar to one of the processes you have studied. Which of the following is most similar to this process?

Based on this pedigree chart, what could be the reason for a disease being expressed? Assume that the circles are females, the squares are males, and the filled-in shapes are the ones infected with the disease. Image Description Generation 1: An empty female connected to an empty male with four offspring. Generation 2: An empty female connected to an empty male with four offspring. A filled male, an empty female, an empty female connected to an empty male with three offspring. Generation 3: An empty female, a filled male, an empty male, filled male connected to an empty female (they are cousins) with two offspring. An empty male, an empty female connected to an empty male with four offspring. Generation 4: In the first family, there is an empty female connected with an empty male with three offspring and an empty female. In the second family, there is an empty female, a filled male, an empty male, and a filled male connected with an empty female with four offspring. Generation 5: In the first family, there is an empty female, an empty male, and a filled male. In the second family,  there is an empty female, two empty males, and a filled male.

From an evolutionary perspective, germ-line mutations are more significant than somatic mutations. This is because ________.

What is genetic drift? 

In the context of meiosis, homologous chromosomes can be defined as ________.

How does a macrophage destroy a pathogen?

You are a doctor examining a patient’s blood test results. The patient’s T cell count is low, and T cells that are present are not well-developed. You are concerned that the patient will ________.

Which of the following is not one of the major differences between RNA and DNA?