Feedback mechanisms regulate the rate of enzyme activity, effectively “turning off” an enzyme in a reversible way until more product is needed. Which of the following would be most effective as a feedback mechanism?…
4. Which of the following statements is accurate in describing the activity of the lactase enzyme during the reaction?…
Mariella Hines is a 9 year-old African-American girl attending the 3rd grade in the JFK School. She was referred to the School Psychologist because she has recently become very withdrawn during class, refusing to speak to anyone, including her teacher and peers. Previously she seemed to have age-appropriate social skills, interacting well at school. Her withdrawal started suddenly. Mariella’s teacher, Mrs. Levine, called Mariella’s mother to find out more information, but her mother said that Mariella seems fine at home.…
6. Briefly describe the two meiotic events that contribute to genetic diversity in a population. Each gamete (sex cell) is unique due to a process during meiosis called cross-over which (simplified) swaps around some genes to create unique chromosome combinations. meiosis helps to create a population that is not only physically and genetically different but also one, which is perfectly fit to survive.…
3. In fruit flies, gray body color is dominant over black body color. Using the letter G to represent body color, what is the genotype of a heterozygous gray…
23.7 23.8 Relate the structure of blood vessels to their function. Explain how and why blood pressure changes as blood moves away from the heart. Explain how blood is moved back to the heart. 23.9 Explain how blood pressure is measured. Give examples of normal and high blood pressure readings. Describe lifestyle changes that can help to reduce high blood pressure. 23.10 Explain how blood flow through capillaries is regulated. 23.11 Explain how the structure of a capillary relates to its functions.…
A- It heightens speed and reaction time and gives strength that you didn't know you had. _______________________________________________________________________…
Yes there was a change because with the starting snail population there was a great variation from 1-7. After the crab began eating only the snails with the thickest shells survived. The snails with the thinnest shells were eaten by the crab. Only snails with shell thickness 4-7 were left after the crab had their meal. The original snails with thickness 1-3 were eliminated from the population by the crab. The crab will usually try to expend as little enrgy as it can to maximaize its happiness so the snails with thinner shells will likely be targeted first and eventually eliminated.…
Process in sexual reproduction in which male and female reproductive cells join to produce a new cell.…
1. Read the press release on the 2001 Nobel Prize. Summarize in a few paragraphs the accomplishments of these scientists, and the relevance of their discoveries. (Answer in 500 words or less. Send to instructor)…
Scientists planted tomatoes and put a batch in sunlight and the others in full shade to find out how the tomatoes would grow and which ones would taste better. They found that the tomatoes in the shade, did not grow very well and did not taste good, whereas the tomatoes that had sunlight, grew to a standard size and had a sweeter taste.…
I think that free earlobes is the dominant trait (Because none of the 20 people I surveyed had attached earlobes). I think that no hair on knuckles is the dominant trait (Because 75% of the people I that surveyed had it). I think that straight hair line is the dominant trait ( Because 75% of the people I that surveyed had it). I don't know whether straight hair or curly hair is the dominant trait (Because it was an even split). I think that no cleft chin is the dominant trait (Because 90% of the people I surveyed had it). I don't seem to exhibit any of the recessive traits shown here. I shared the same chin shape, earlobes and amount of hair on knuckles. I didn't exhibit any trait that was not exhibited in my parents. If an offspring exhibited a recessive trait that neither parent exhibited, it would mean that both parents carried it. I was surprised that none of the 20 people had attatched earlobes. Yes, It is possible that a recessive trait…
All have heard the saying, “Great minds think alike.” When many great minds of the colonies gathered…
1. Outline the process of DNA profiling (genetic fingerprinting), including ways in which it can be used. 6 marks…
Bats got the white nose fungus which caused the bats to die and the insect population flourished because the bats main job was to eat the insects.…