Fixation
Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria
New data about evolutionary relationship between organisms
Explanation:
New data about the evolutionary relationship between organisms most likely dictated that the domain level is adopted.
- Evolutionary trends and morphological relationship between organisms became very important in the classification system.
Organisms are classified into the domain levels as:
- Archaea,
- Bacteria,
- Eukarya
This classification is based on the sequences of nucleotides in the cell.
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Answer:
Lipids
Explanation:
Lipds are fats
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Answer: Polar molecules have an uneven distribution of electrons that cause one end of the molecule to have a positive charge and the other to have a negative charge. ... This means that in a polar bond, the electronegativity of the atoms will be different. For nonpolar bonds the electronegativity of the atoms will be equal.
Explanation:
Answer:
The correct answer is (b) epinephrine.
Explanation:
Epinephrine, also known as <em>Adrenaline</em>, is a hormone secreted by the medulla of the adrenal glands.
In medicine, epinephrine is used as a stimulant in cardiac arrest, as a vasoconstrictor in shock and as a bronchodilator and antispasmodic in bronchial asthma.
When epinephrine is inhaled in small doses, it causes short-term relief from the symptoms by widening the bronchial tubes allowing air to pass through.
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