1. The oxygen requirements of an animal cannot be met by the process of diffusion as diffusion is a very slow process. To overcome this, multicellular organisms have specialized cells and tissues for performing various necessary functions of the body such as intake of oxygen and food.
2. What criteria do we use to decide whether something is alive? Any visible movement such as walking, breathing, or growing is generally used to decide whether something is alive or not. However, a living organism can also have movements, which are not visible to the naked eye.
3. An organism uses outside raw materials mostly in the form of food and oxygen. The raw materials required by an organism can be quite varied depending on the complexity of the organism and its environment.
4. The various processes essential for maintaining life are nutrition, respiration, transportation, excretion, control and coordination.
here it is hope it helps you out...
Answer:
Explanation:
The hox gene provides a huge amount of important information about evolution. Hox genes duplication made increased morphological complexity possible triggering the formation of neural crest cells and allowed them to disperse throughout the body, forming a variety of structures. They help lay out the basic body forms of many animals including humans, flies and worms.
<span>They were produced by recombinant DNA technology. </span>
The correct order from smallest to largest
would be:<span>
<span>H < C < N < O < Amino acid < Globular
Structure < Amino acid sequence</span>
<span>The smallest should begin from the basic elements. Among C,
H, O and N, the lightest is Hydrogen, followed by Carbon, Nitrogen, and Oxygen.
Next is the amino acid which is the most basic unit of protein. This is the
linear structure. Followed by the globular structure which is the tertiary
structure. The whole would be the amino acid sequence which is quaternary
structure.</span></span>
