Atmospheric nitrogen, despite being abundant, is largely unusable by most living organisms due to its non-reactive nature. It can only be used after it's converted into reactive forms like nitrates or ammonia, a process carried out by certain bacteria through nitrogen fixation.
Atmospheric nitrogen is largely inaccessible to most living organisms, including plants and animals, due to its stable, triple-bonded molecular structure. However, it can be used by most living things after it has been converted into more reactive forms such as amino acids, nitrates, or ammonia, a process known as nitrogen fixation.
Nitrogen-fixing bacteria, which live freely in the soil or in symbiotic relationships with certain plants, play a fundamental role in transforming atmospheric nitrogen into a form that other living organisms can use for their growth and survival. This process is a vital part of the nitrogen cycle, a crucial ecological system that regulates the amount of nitrogen in the environment.
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This similarity can be explained by Charles Darwin's Theory of Evolution. Humans and chimpanzees share a common ancestor wherein a number of million years ago, due to adaptation of their environment, human species branched out and eventually evolved into Homo sapiens.
Answer:
The correct answer would be common ancestry.
Common ancestry means that different species have been established from a single parent species or population.
Organisms which share more recent common ancestors tend to have more similarity as compared to the organisms which share an older ancestor.
Humans and chimpanzees also believed to evolved from a common ancestor around 6-7 million years ago.
It is the reason why humans and chimpanzees share around 96-99 percent of the DNA.
b. disease vectors
c. high levels of contaminants
d. all of the above
Answer;
-All of the above
-pathogens, disease vectors, and high levels of contaminants
Explanation;
Water pollution is a large set of adverse effects upon water bodies (lakes, rivers, oceans, groundwater) caused by human activities. Water pollution is caused by;
Answer:
The Correct answer is B, Staphylococcus.
Explanation:
The Catalase test is used to differentiate Staphylococci (Catalase positive) from Streptococci (Catalyst negative). The enzyme catalase is produced by bacteria that respire using oxygen and protects them from the toxic by-products of oxygen metabolism.
Catalase positive bacteria includes strict aerobes as well as facultative anaerobes. Catalase negative bacteria maybe anarobes or facultative anarobes that only ferment and don't respire using oxygen as terminal electron acceptor.
Catalase converts hydrogen peroxide to water and oxygen gas. Though both Staphylococcus and Streptococcus are gram positive bacteria, only Staphylococcus produces catalase enzymes.