Calcium carbonate
Explanation:
The chemical most commonly used to counteract the effects of acid precipitation on aquatic ecosystems is calcium carbonate.
Acid rain or acid deposition or acid precipitation is any form of precipitation with an elevated level of hydrogen ion concentration in them.
To nullify this acidic precipitation in aquatic ecosystem, we need to use an environmentally friendly alkaline agent.
The most desired is calcium carbonate. The carbonate neutralizes the acid by producing carbon dioxide, water and calcium salts.
only eukaryotes can perform cellular respiration. More specifically, the two types of organisms that can do this are autotrophs and heterotrophs.
Examples of heterotrophs: animals, fungi, the majority of bacteria, ...
Examples of autotrophs: grass, algae, a few bacteria, ...
Answer:
2. Bladder
Explanation:
The brain, spinal cord and nerves are the part of the nervouse system.
Answer: Group 16 elements form ions with a 2 - charge.
Explanation: Therefore each of these elements would gain one electron and become an anion with 1 - charge.