ionic bonds : These are bonds formed from the donation and acceptance of electrons between elements, giving rise to strong compound
Covalent bonds: bonds formed when electrons are shared between elements giving rise to compounds
metallic bonds; are bonds found only in metals.
Answer:by breaking down carbonic acid into carbon dioxide and water.
The carbon dioxide is expelled from the body
Explanation:the body is able to maintain a constant internal environment through hoemostatis.one of such control is the acid-base balance in the body.
It does this by regulating the amount of hydrogen ions in the blood.A low pH indicates an acidic condition and a high pH indicates an alkaline condition.
The human blood has a pH of 7.35---7.45.it is slightly alkaline and needs to keep this range constant.
The lungs and kidneys involved in regulating the body pH.
When there is excess hydrogen ion in the blood, bicarbonate ions combine with the hydrogen ions to form carbonic acid . this carbonic acid breaks down into water and CO2 .the co2 is expelled from lungs through gaseous exchange.
When the accumulation of acid in the blood is high,the pH drops below 7.35 and this is called respiratory acidosis.
When there is excess alkaline in the blood,the pH goes beyond 7.45 and this is called respiratory alkalosis.
1. The correct answer is option B, single-celled eukaryotes that sometimes grew in colonies
Reason – Single celled species are originally the main ancestors of all animals because after evolution and classification, these species evolved into multicellular organisms which later on further diversified into different generas, species and classes. Living in colonies allowed these single celled species to produce sexually
2. The correct answer is option B, representatives of most animal phyla
Reason – The cambarian explosion is considered as the most evolutionary phase in the Earth’s history. All major animal body plans including Ctenophora, Poriferas, Cindaria, Chordata, Hemichordata, Echinodermata, Nematoda, Artropoda, Platyhelminthes, Mollusca, Annelida, Brachiopoda etc. occurred during this period.
B. Pure Air Filtering System (PAFS).
C. Biological Identification and Screening Filter (BISF).