Answer:
a. None of the answers given is correct
Explanation:
Nitrogenous bases such as uracil (2, 4-dioxy pyrimidine), thymine (2, 4-dioxy-5-methyl pyrimidine) and cytosine (2-oxy-4-amino pyrimidine) are pyrimidines. Cytosine and thymine are found in the DNA but in the RNA, thymine is replaced by uracil.
The pyrimidine undergoes catabolism through ring cleavage. The end products of catabolism are beta-amino acids, ammonia and carbon dioxide.
<h2><em>
Streptococcus pyogenes</em></h2>
Explanation:
On looking through the microscope we will see purple, spherical-shaped organisms arranged in chainlike formations.
The reasons are:
- Streptococcus pyrogenes is a gram positive bacteria and hence it will take up Gram's stain and appear purple in color.
- Streptococci are colonial bacteria that are spherical in structure arranged in chain like formations.
<em>Streptococcus pyogenes </em>usually inhabit the skin of humans and are causative organisms of several infections such as tonsilitis, pharyngitis cellulitis, dermal infections etc.
Carbon dioxide and oxygen
If an ecosystem lost its producers, there would be no way for energy to move up the web and the ecosystem would most likely fail. Without these energy-capturing organisms, herbivores would get no energy or food. Without them, carnivores would get nothing as well. Because decomposers get energy from all three, they would also die out.
If only decomposers were removed, there would be a lack of nutrients in the soil for plants. This would result in the above (loss of energy, food, and other commodities).
I hope I helped!
Answer:
<em><u>The water in lakes comes from rain, snow, melting ice, streams, and groundwater seepage. If water leaves a lake by a river or other outlet, it is said to be open. All freshwater lakes are open. If water only leaves a lake by evaporation, the lake is closed.</u></em>
