D a medium sized star because the largest star is canis majoris and the smallest star is brown dwarf..☺
true is the correct answer
Answer:
Coral reefs ecosystem : It is a type of ecosystem which is present inside the ocean water. It is made up of coral, sponges and crustaceans etc.
It is very important to conserve biodiversity of marine because more than twenty five percent of marine animals are live there. If these coral reefs are removed from marine ecosystem, many species of marine such as fishes, crustaceans will be adversely affected.
(i) The investigation was carried out at 40°C because the temperature is near optimum temperature and it denatures at a higher temperature.
(ii) The effects of increasing the pH on rate of activity of enzyme Q will be the increase in activity from pH 3 to pH 7, the decrease in activity from pH 7 to pH 11 and the optimum pH.
Process by which the internal structure of a mineral is altered by the addition or removal of elements. Change in phase (mineral type) and composition are due to the action of chemical agents. Chemical weathering is dependent on available surface for reaction temperature and presence of chemically active fluids.
