Answer: Receptor
Explanation: A virus can latch onto a receptor, which gives it access to attach and inject their genetic material.
Option D
New crops may require larger amounts of water than the previous ones.
A. Settling Tank - 3. A principle tool of primary sewage treatment. Lightweight solids, grease and floating particles are skimmed off the top and heavier materials sink to the bottom as sludge.
B. Trickle Filter - 4. A secondary sewage treatment system used in smaller communities. Effluent from the primary treatment slowly flows through a shallow artificial stream. The water is oxygenated as it flows over the rocks. The rocks become covered with a zooglial mass of aerobic microorganisms that break down organic matter to CO2.
C. BOD - 2. An abbreviation that stands for Biochemical Oxygen Demand. This is a measure of the total amount of organic matter that is dissolved in a sewage sample.
D. Activated Sludge System - 5. A secondary sewage treatment system used in larger communities. Effluent from the primary treatment is seeded with sludge that contains a high concentration of metabolizing bacteria and vigorously aerated. Aerobic metabolism breaks down organic matter that is dissolved in the water to CO2. Growth of microorganisms produces more sludge, which is allowed to settle out.
E. Imhoff Tank - 6. A container for the anaerobic digestion of sludge. Anaerobic bacteria ferment organic matter producing CO2, H2 and small organic acids such as acetic acid and formic acid. Then anaerobic archaea convert the small acids, CO2 and H2 to methane.
F. Floc - 1. A particle of organic matter that sinks to the bottom of a tank. These particles particles consist of little pieces of organic matter covered with microorganisms. The microbial population of the particles is a mixed community of bacteria and fungi that degrade organic compounds and protozoa that eat the smaller microorganisms. Sometimes alum is added to the sewage, this helps increase the formation of larger particles that settle out faster.
<h2>Visible spectrum of photon emission</h2>
Explanation:
- An action spectrum is ordinarily plotted so that the "activity" appeared on the y-axis is estimated with an equivalent number of photons at every wavelength of the unmistakable range. In any case, our sun doesn't emanate equivalent quantities of photons at every wavelength.
- Rather, the sun transmits the most photons in the yellow piece of the range, with moderately fewer photons discharged in the red and violet-blue pieces of the range. In this manner, the red and violet-blue districts of Engelmann's action spectrum were estimated with fewer photons than in the yellow piece of the range.
- To correct for this, you need to consider how expanding the quantity of photons in the red and violet-blue pieces of the range - to coordinate the emission level in the yellow part- - would change the measure of oxygen created, and therefore the number of microscopic organisms that amassed, in the red and violet-blue spectral region. The rectified action spectrum would show higher tops in the red and violet-blue pieces of the range, yet the plot in the yellow piece of the range would be around equivalent to Engelmann's.
Answer: <span>aquatic animals
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External fertilization is the kind of fertilization that happens outside the female body. The female will put the unfertilized egg outside and the male will eject the sperm later.
This will cause the sperm have to mobilize further to the egg than internal fertilization. That makes this method only viable in water or highly moist area.