78% of Earth's atmosphere is nitrogen gas. All living things need nitrogen as a part of DNA and RNA. Yet you and I, and other li
ving things, cannot use the nitrogen in our atmosphere directly. One type of organism is responsible for "fixing" nitrogen or helping to put it in a form so other living things can use it. That organism is? A) bacteria.
B) fungi.
C) plants.
D) viruses.
Explanation: Nitrogen fixation means converting the atmospheric nitrogen to Ammonia or to other compounds which can be readily used by other organisms. As stated in the question, the nitrogen available in the atmosphere is inert, so it must be converted into a form so that the organisms can use it. The bacteria responsible for this activity are known as Nitrogen Fixing Bacteria and are an important element of the ecosystem. Some of these Nitrogen fixing bacteria live freely in the soil while some are associated with the crops. Some examples of Nitrogen fixing bacteria are Rhizobium and Azospirillum.
We use the classification system when grouping organisms, which are very diverse. The sub-group with the least amount of diversity is the species. The measure of diversity in this classification will of the variation in genome and physical characteristics. The species have a slight variation in the genome and phenotype compared to the amount of variation in a genus, where related species are clubbed together. The amount of diversity increases from the nodes of a classification tree to its root or parent (kingdom).
This is important for the flowers <span>sexual reproduction cycle because the transfer of the pollen from the male flowers to the female flowers is what causes the flowers to reproduce.
This would not be considered </span><span>asexual reproduction because the flowers cannot reproduce on its own without the male part transferring its pollen to the female part.
