Why are large cells not as efficient as small cells? Why are proteins on the surface of cells so important and what roles do these proteins play? (a) What is the role of microglial cells? (b) Why are they so important in the CNS?
Cells divide. This makes cells small. Why do cells divide? Why must cells be small? Asexual Reproduction Mitosis Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and animals? 4 How do little elephants grow up to be BIG elephants?
How do internal regulatory proteins affect the cell cycle? (a) What is the role of microglial cells? (b) Why are they so important in the CNS? Why is pH important to enzymes? Why is the citric acid cycle called a cycle? What substances enter the cycle, and what metabolic eff...
This is a result of asymmetric segregation of the X chromosome in male meiosis II, which gives rise to XX sperm. As a result, either one or two paternally-derived X chromosomes are eliminated from the embryo, which initiates female (XX) or male (X0) development, respectively (Fig. 1B)...
Sickle cells The gene for this disease is prevalent in Sub-Saharan Africa, where malaria is common. Individuals who carry only a single sickle-cell gene are more tolerate of malarial infection. Lactase Persistence Modern-day lactose intolerance in humans ...