How do normal cells reproduce? During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells. Because this process is so critical, the steps of mitosis are carefully controlled by a number of genes. When mitosis is not regulated correctly, health problems such as cancer can […]

Which genes are likely to be separated by crossing over? Crossing over occurs when two homologous chromosomes exchange genetic material during meiosis I. The closer together two genes are on a chromosome, the less likely their alleles will be separated by crossing over. What is the difference in meaning between the terms genetic recombination and […]

What is the difference between an animal cell and a plant cell? A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. Animal cells simply […]

Which body regions are part of the cephalic region? Explanation: my notes say the cephalic region includes eyes (occipital) brain, ears, mouth, chin, cheeks, jaw, and nose. now, these are all also included in the facial region, and the facial region is part of the frontal region, therefore, frontal. What are the 5 regions of […]

How do you clean a knife after cutting raw chicken? The best way to clean a knife after cutting raw chicken is to wash it by hand in soapy water and, after, soak it in a solution of 1 quart water and 1 tablespoon household bleach. Cleaning the knife by hand will wash away any […]

What does cosmology mean? the study of the physical universe What is cosmology and astronomy? Cosmology is a branch of astronomy that involves the origin and evolution of the universe, from the Big Bang to today and on into the future. According to NASA, the definition of cosmology is “the scientific study of the large […]

What are the male reproductive parts of a flower? Stamens: Male Reproductive Organs A stamen consists of an anther (which produces pollen, the male reproductive cell) and a filament. What are the 5 main reproductive parts of a flower? Parts of the flower include petals, sepals, one or more carpels (the female reproductive organs), and […]

What do DNA polymerase and RNA polymerase have in common? The DNA polymerase adds dATP, dGTP, dCTP and dTTP to the growing DNA strand while the RNA polymerase inserts dATP, dGTP, dCTP and dUTP to the growing RNA strand. The DNA polymerase has polymerization as well as proofreading activity while the RNA polymerase only has […]

How did the germ theory improve public health? In 1861, Pasteur published his germ theory and, by 1865, had proved the link between germs and disease. In 1879, he discovered a vaccine for chicken cholera. He found that when the germ was exposed to air it weakened, and that injecting this weakened germ into chickens […]

What happens when the jet stream moves south? Jet streams generally push air masses around, moving weather systems to new areas and even causing them to stall if they have moved too far away. If the jet stream dips south, for example, it takes the colder air masses with it. How does the jet stream […]