Cytokinesis-the actual process of cell division-has attracted theorists for well over 100 years. It has been said that all possibleexplanations of cytokinesis have been proposed; the problem is to decide which one is correct. Consider the following three hypotheses: 1. Chromosome signaling: When chromosomes split at anaphase, they emit a […]

Biology class. Must cite work, must be 250 words. YouTube URL: http://www.youtube.com/watch?v=rjza24Oyalc Dieters often talk about their metabolism. What is metabolism? Catabolism? Anabolism? Total metabolic rate (TMR)? Basal metabolic rate (BMR)? Is having a higher metabolic rate a good thing? Does a high metabolic rate promote aging? What factors contribute […]

1. What is Knudson’s Multistep Cancer Model? How does it explain that some people have a “predisposition” to cancer?2. How do tumors evolve?3. Cancer genes fall into 2 catagories. What are they?4. How can viruses cause cancer?5. What are Cyclin-dependent kinases and how are they related to cancer?6. What’s the […]

1. The common ancestor of all the tetrapod vertebrates had four limbs with a similar skeletal structure to thatseen in many vertebrates today. Considering this, in what sense are the arms of humans homologous to thewings of a bird? 2. The green algal ancestors of plants existed in aquatic habitats, […]