Answer:
oxygen and hydrogen had equal electronegativity.the covalent bond of water molecules would not be polar,and water molecules would not form hydrogen bonds with each other
Explanation:
explanation was been given in the answer
Answer:
Option-2
Explanation:
Endosymbiosis theory explains the origin of the eukaryotic organism from the prokaryotes by observing the mitochondria and Chloroplast as evidence.
The endosymbiosis theory proposed that a protoeukaryote engulfed the autotrophic bacteria which evolved into the chloroplast and a chemotroph which evolved into the mitochondria.
These events could have taken when the autotrophic bacteria started using carbon dioxide and produced oxygen in the atmosphere that is around 541 million years ago.
When the concentration of the oxygen increased then the mitochondria would have used this toxic gas to produce energy and the chloroplast also formed a symbiotic relationship at that time.
Thus, Option-2 is correct.
Answer: The cell membrane is made up of phospholipids and the overall name is the Phospholipid bi-layer
Explanation:
The cell membrane has two rows of phospholipids. A phospholipid is broken into two parts, the heads and tails. The heads are hydrophilic (water-loving) and point to the outside and inside regions making the inner and outer wall, while the tails are hydrophobic (water-hating) and face each other to make the inside of the membrane. There are also molecules of cholesterol and proteins throughout the membrane.
Answer: Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).
Explanation: