The correct answer is A
volcanic eruption
Volcanic eruption is defined as the sudden rush of energy materials such as gas,lava and steam. all the others processes takes a great deal of time. For example decomposition takes a long time. Pond succession is dependent on settling of debris and hence takes a long time. regrowing of a forest after a a volcanic eruption can span several years,especially if indigenous trees are the main tree species.
Bacteria defend themselves against viral infections<span> by modification of the receptor sites as well as involvement of </span>restriction endonuclease enzymes<span> which acts on</span>viral<span> DNA and not acting on self as the </span>bacterial<span> DNA is methylated.</span>
<span>D increasing the accumulation of organic materials
NOT:
</span>A decreasing the potential for soil erosion
B increasing the food available for consumers
<span>C decreasing the nutrients available for new plants</span>
Whale shark reproduction can be by laying eggs that is also called oviparity where the female deposits eggs in the algae or rocks. The embryos formed inside the eggs and feed on the yolk. They can also reproduce through viviparity which means by giving birth just like mammals wherein they are born fully formed. This reproduction process is through the placental link to the eggs wherein the yolk sac grows within a placenta that is connected to the wall of the uterus and gives the offspring the nutrients vital for their growth. Another reproduction process is through Ovoviviparity where eggs are formed inside the mother where the eggs hatch within the oviduct of the female and the young feed on the egg yolk of the yolk sac and the fluids that the walls of the oviduct secrete since the mother does not provide any food directly. Once the eggs are ready, eggs hatch inside the mother and it pups keep getting food from their surroundings until they are fully developed. The number of their offspring and the length of the gestation periods varies according to the species. Probably a female of some species may have only two offspring, but some other species may have between forty and eighty. The small sharks have shorter gestation period compared to large species that last from three to four months or up to more than two years. The large ones reproduce every two years, while the little ones have offspring each year. This is why the reproduction process of whale shark is not known in detail.
Bright cherry red color is produced upon the addition of methyl red indicator to a culture of a Gram negative bacilli in MR-VP broth if the organism used the mixed acid pathway of fermentation.
What is MR-VP test?
- As part of the IMViC testing, Methyl Red (MR) and Voges-Proskauer (VP) broth is utilized as the medium in which both the Methyl Red and Voges-Prosakuer tests can be conducted.
- It is a straightforward broth made up of dextrose or glucose, buffers, and peptone.
- In the Methyl Red test, an infected tube of MR-VP broth is mixed with the pH indicator methyl red.
- The acids will overwhelm the buffers in the medium and create an acidic environment if the organism employs the mixed acid fermentation pathway and creates stable acidic end products.
- If acidic end products are present when methyl red is introduced, the methyl red will remain red.
Learn more about the MR-VP test with the help of the given link:
brainly.com/question/27962086
#SPJ4
