Acat is composed of organ systems, which are composed of organs, which are composed of tissues, which are composed of cells. describes what characteristic of life?

The correct answer is - cellular organization.

Explanation:

The first and major characteristic of life is a cellular organization out of eight major characteristic features of life every living organism possesses. It says that living things are made of cells. The cellular organization is the fundamental base of the growth and evolution of life.

The evolution of life includes the organization of the micromolecules to the macromolecules that form cell organelles and organelles to a cell, cells form tissue and tissues to organ and organ to organ system and ultimately this complex organization forms the whole organism such as cat.

Thus, the correct answer is - cellular organization.

answer; polycythemia is the correct answer;

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: