The absence of in the primitive atmosphere was essential to the origin of life on earth.

Oxygen gas

Explanation:

Oxygen is the most essential gas that supports life. In the early atmosphere, during the time of the formation of the earth, there was the absence of this gas. But after a certain period of time, roughly about 2.3 billion years back, there was slightly an increase in the atmospheric oxygen that helped in the origin of life, forming unicellular organisms such as cyanobacteria and blue-green algae.

These organisms were present in the water bodies that carried out the process of photosynthesis, by absorbing CO₂ gas in the presence of sunlight and liberating O₂ gas. This, over millions of years, led to the evolution of life and created more complex multicellular organisms.

Thus, Oxygen is highly essential for the origin of life on earth.

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.