Answer:
<em>Staphylococcus</em> is a gram negative bacteria that belongs under family Staphylococcaceae.The name is given as their body shape is spherical(Cocci).
Explanation:
The important characters of Staphylococcus are-
- <em>Staphylococcus </em>are facultative anaerobic organism.
- They are spherical in shape.
- As they are gram positive bacteria, thus the cell wall is prominant and easily stained with crystal violet and they are grown in bile salts.
- They are capable of producing coagulase enzyme that cause blood clot.
- These bacteria divides along two axes and thus form clump of bacteria.
Difference between <em>S. aureus</em> and <em>S.epidermis-</em>
- <em>S. aureus</em> is round in shape where as<em> S.epidermis</em> is spherical in shape.
- <em>S. aureus</em> is a opportunistic pathogen that cause different diseases like skin infection where as<em> S.epidermis</em> is non pathogenic bacteria.
- <em>S. epidermis</em> form white raised cohesive colony with 1-2 mm in diameter whereas, <em>S.aureus</em> form golden yellow color colony.
- <em>S.aureus</em> causes hemolysis when it is grown in agar plate whereas <em>S.epidermis</em> is not hemolyse in blood agar plate.
Answer:
Water and energy are the raw materials for bread making
Explanation
Gluten is formed from water and water also gives consistency to dough. Roughly 40% of dough is water. It also provides medium to dissolve sugar and enzymes in dough making for bread. It does gelatinisation of starch that helps in easy digestion of bread. Energy and heat are used to distribute water through the bread.
The correct answer is: The trench is formed by a subduction zone which has also created volcanic islands.
As all the other trenches on the plate boundaries of the Pacific plate, the Aleutian Trench, on the boundary between the Pacific and the North American plate, has also come to be because of the subduction zone appearing between the two plates.
The lower and heavier Pacific plate is subducting bellow the North American plate, and that results into large deep spaces opening up between the two plates, thus the emergence of the trenches. Also, because the magma from bellow the crust has easy access to the surface, it comes upwards and creates multiple islands with the volcanic activity that it produces.
Answer:
Explanation:
Oxygen gas and water must be present for iron to rust.
A region of the metal’s surface serves as the anode, where oxidation
occurs:
Fe(s) → Fe²⁺ (aq) + 2 e⁻
The electrons given up by iron reduce atmospheric oxygen to water at the cathode, which is another region of the same metal’s surface:
O₂ (g) + 4H⁺ (aq) + 4 e⁻ → 2 H₂O (l)
The overall redox reaction is:
2 Fe(s) + O₂(g) → 4H⁺(aq) + 2Fe²⁺ (aq) + 2 H₂O(l)
The Fe²⁺ ions formed at the anode are further oxidized by oxygen:
4 Fe²⁺ (aq) + O₂(g) 1 (4 + 2x) H₂O (l) → 2 Fe₂O₃ . xH₂O(s) + 8 H⁺(aq)
This hydrated form of iron(III) oxide is known as rust. The amount of water associated with the iron oxide varies, so we represent the formula as 2 Fe₂O₃ . xH₂O.
