Answer:
The condition of the Earth had to become favourable before it could support any form of life.
The formation of the different layers around the earth like the ozone layer was necessary before life could originate. Primitive species such as some prokaryotes were able to live in hydrothermal conditions during the initial times. With the passage of time, as the concentration of oxygen increased due to photosynthetic prokaryotes, situations became favourable for eukaryotic organisms to arise.
Answer:
Mycorrhizas are symbiotic associations essential for one or both partners, between a fungus.....
Answer:
Homeostasis refers to the ability of the body or a cell to seek and maintain a condition of equilibrium or stability within its internal environment when dealing with external changes. It is involved in the maintenance of the constant internal environment which includes the function of kidney, liver, skin, etc.
Explanation:
https://www.biology-online.org/dictionary/Homeostasis
Answer:
The correct sequence of steps in citric acid cycle has been mentioned below -
Explanation:
- 2 acetyl CoA molecules are produced from the breakdown of one glucose molecule.
- Acetyl CoA combines with oxaloacetate to form citrate and releases CoA.
- Two carbon atoms are released from acetyl CoA and combine with oxygen to form carbon dioxide.
The sequence of steps is correct in the question i.e. 1 → 2 → 3
These are the first three steps in the citric acid cycle which occurs during the cellular respiration.
