E. systematic aorta
D. left ventricle
C. left atrium
A. pulmonary artery
B. superior venacava (i’m not sure if this one is right)
Answer:
Archaea are found in the harshest environments on Earth, and are the oldest known organisms on Earth, appearing in the fossil record over 3.6 BILLION years ago
Explanation:
Hope this helps!
Answer:
Restriction endonuclease
Explanation:
It cut the DNA at specific sequence and it is very useful in biotechnology
The incorrect statement about the nitrogen cycle is option A: nitrate and nitrite reductases in denitrifying bacteria convert ammonia to nitrogen gas.
The biological nitrogen fixation (BNF) is the process by which atmospheric nitrogen is changed into ammonia, and the nitrogen-fixing bacteria are known as diazotrophs. Fixation, ammonification, nitrification, and denitrification are significant nitrogen cycle processes. Ammonia is converted to nitrites and then to nitrates which are absorbed by plants with the help of their roots. Therefore, option A is incorrect.
Through bacteria that fix nitrogen from the atmosphere, nitrogen enters the living world. Soil bacteria convert this nitrogen and nitrogenous animal waste back into gaseous nitrogen, supplying the organic nitrogen required by terrestrial food webs.
To know more about nitrogen cycle, refer to the following link:
brainly.com/question/11662775
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