Because bacteria can be attached to almost anything due to its chemical properties
1) Scientists believe that the ancient ancestors of all animals were <span>single-celled eukaryotes that sometimes grew in colonies.
</span>Eukaryotic cells have membrane-bound organelles such asmitochondria<span> and the Golgi apparatus.
</span>The best answer is :
<span>B) single-celled eukaryotes that sometimes grew in colonies</span>
Answer: Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms
Explanation:
because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules. Having the atomic number 6, every carbon atom has a total of six electrons.
Answer is Nitrogen, atomic number 7
The atomic number of nitrogen is 7. Hence, the number of electrons in the nitrogen atom is 7. In the nitrogen, valance electrons are 3 in number in 2P orbital. Its valency is 3. Therefore, it can make three bonds with other elements which is highest among the given options.
Answer: Rheumatoid arthritis
Explanation:
Rheumatoid arthritis is a disease which is a autoimmune disease which is usually associated with the pain and inflammation in the joints. This is the condition in which the person is not able to walk or sit for a longer period of time as it is painful.
The lysosomes is an enzyme that is found in the saliva and tears of human beings which helps in the degradation of the cell wall.
In case of autoimmune diseases the antibody present in the body destroys the cells of the body considering it as self antigen. Its concentration is found high in the people suffering from this autoimmune disorder.
