Answer: Option (A) is the correct answer.
Explanation:
Beaches are the places which are part of shore of an ocean, sea, large river etc.
There are pebbles and sand at the shore of a beach. Waves of water in an ocean always change the ocean due to erosion and addition of sand.
It is the force acted by the wave that pushes or pull the sand in different directions every time the wave comes.
So we can conclude that the statement beaches are always changes due to factors such as waves adding and eroding sand best describes beaches.
Answer:
Oxygen
Explanation:
Cellular respiration is the process whereby living organisms synthesize energy in form of ATP. However, it can either be aerobic or anaerobic depending on whether it occurs with or without oxygen. Aerobic respiration occurs in the presence of oxygen.
The aerobic cellular respiration is further divided into glycolysis, Krebs cycle and oxidative phosphorylation. The oxidative reactions used by aerobic bacteria to generate ATP use OXYGEN as a terminal or final electron acceptor.
<h2>Answer:</h2>
An obligate aerobe, by contrast, cannot make ATP in the absence of oxygen, and obligate anaerobes die in the presence of oxygen.
An obligate aerobe is an organism that requires oxygen to grow. Through cellular respiration, these organisms use oxygen to metabolise substances, like sugars or fats, to obtain energy. In this type of respiration, oxygen serves as the terminal electron acceptor for the electron transport chain.
An Obligate anaerobes are poisoned by oxygen, so they gather at the bottom of the tube where the oxygen concentration is lowest.
