Remember, when a cell exists in a solution, the concentration of substance dissolved in the solution has a big effect on the cell. If there is more stuff dissolved in the solution than what is dissolved in the cell, then the solution sucks water out of the cell, killing it. If the solution has less stuff dissolved in i...
We do not include human anatomy in our biology course because biology is a tough course on its own. A student does not need to study human anatomy in order to be prepared for college biology. ...
We didn’t go into this in the book, because the processes are complicated enough as they are. During the replication process of meiosis I, the homologous chromosomes actually exchange genes. That way, when they are duplicated, they are not identical to the originals. That adds a lot of variability to the genes. After a...
You will probably not see the blue with the naked eye. The iodine is turning blue in response to the starch in the cells. As long as the cells and nuclei are visible under the microscope, you are fine. ...
The most important thing to determine is WHAT you measured the temperature OF. If you measured the temperature of the bag, then the temperature will be higher for the carbon dioxide bag. That’s because the carbon dioxide is trapping the heat, and thus, it heats up. Therefore, your thermometer was probably in thermal co...
Perhaps in some countries, it is hard to find meat tenderizer. However, any large supermarket should carry some. If you cannot find any, you might try a kiwi fruit. It has the same chemical (papain) that meat tenderizers use. Ideally, the fruit should be a tad under ripe. Peel the fruit and just add the whole peeled fr...
The four cells in this question have already gone through meiosis I and are now going through meiosis II. Since there are four cells **after** meiosis I, this means there were two cells **prior** to meiosis I. When these four cells go through meiosis II, eight cells are produced. Prior to meiosis: Two diploid cells w...
Yes, if the cell is already haploid with duplicated chromosomes. After all, the whole point of meiosis I is to take a diploid cell and make it haploid with duplicated chromosomes. The question tells you that the cell is haploid with duplicated chromosomes. If the cell is already like that, meiosis I CANNOT happen. ...
You can go to a pet store and ask to take samples of water from an aquarium. The variety of microorganisms you will see will be different, but you will see microorganisms. If you cannot obtain water from an aquarium, you might try a dog’s water bowl, as long as it has set out for a few days. There will also be microorg...
Pollination from one species of plant to another is possible, if the plants are similar enough. That’s how gardeners come up with exotic plants. However, it does not happen very often. **There are two main reasons.** 1. Plants have infection-fighting mechanisms. A cell from a plant that is not recognized will be tr...