This question is quite challenging because the text mentions scientists dating the crater back to the period when dinosaurs went extinct according to fossil records, which makes it seem accurate. However, it fails to clarify the source of the fossil records or the validity of that record, which raises doubts. Therefore, I would categorize it as false.
Conducting a serial dilution along with a plating experiment allows for the quantification of bacteria or microbes present in a specified volume of a soil sample. In this standard procedure, a designated volume taken from the lesser dilution is placed on a median plate, which is then allowed to incubate for the appropriate duration. The resulting colonies are counted to ascertain the overall Colony Forming Units (CFU) based on the volume of the sample that was plated and the amount of soil sample that was utilized. The calculation follows this formula: CFU/ml = Number of colonies counted × dilution factor / volume plated. In this scenario, we have: Number of colonies counted = 97, dilution factor = 10^(-6), and volume plated = 1/10 = 0.1. Therefore, the calculation proceeds as: CFU/ml = 97 * 10^(-6) / 0.1 = 97 * 10^(-7) CFU/ml. This figure represents the concentration of bacterial colonies per unit volume of the plated sample. Given that the original soil sample weighs 1g or 1000 mg, the total number of bacteria can be estimated with this formula: Amount of bacteria in original sample = 97 * 10^(-7) CFU/ml × 1/1000 mg = 9.7 * 10^(-3) CFU/mg.
Answer AND Explanation:
It leads to contrary seasons in both the Northern and Southern Hemispheres.
obliquity
A reduction in this value signifies a more circular path.
eccentricity
It influences the position of the North Star, presently situated above Earth's northern axis. precession
Answer:
Explanation:
For approximately 250 years, or two and a half centuries, there has been a rapid consumption of fossil fuels to satisfy human demands. These fossil fuels release significant quantities of carbon dioxide when combusted. As a result of burning these resources in factories, power plants, vehicles, and more, carbon is emitted into the atmosphere. Carbon dioxide acts as a greenhouse gas, which leads to the trapping of heat and an increase in global temperatures.
It's projected that nearly 5.5 billion tons of carbon dioxide are emitted annually due to fossil fuel combustion. This vast quantity is overwhelming for plants to convert into oxygen through photosynthesis, causing an imbalance in the carbon cycle. Consequently, more carbon dioxide is produced than can be absorbed, ultimately contributing to a rise in the planet's temperature as the excess carbon dioxide captures additional sunlight.
Chlorophyll serves as the carbon source in the sugar molecules.
