. Answer the following questions : -
a. Why is nutrition necessary for an organism?
b. What are hormones?
C. Define the term evolution?
d. What is regeneration?
Answers
Answer:
They are necessary to the lives of people, plants, animals, and all other organisms. Nutrients help break down food to give organisms energy. They are used in every process of an organism's body. Some of the processes are growth (building cells), repair (healing a wound), and maintaining life (breathing).
Answer:
Answer a. They are necessary to the lives of people, plants, animals, and all other organisms. Nutrients help break down food to give organisms energy. They are used in every process of an organism's body. Some of the processes are growth (building cells), repair (healing a wound), and maintaining life (breathing).
Answer b. Hormones are the chemicals that are responsible for controlling and regulating the activities of certain cells and organs. These hormones are secreted by ductless glands known as endocrine glands.
Answer c. Evolution is a process witnessed in living entities wherein gradual changes are observed in the characteristics of species over generations attributed to the process of natural selection. ... It is based on the very fact that all species are related and eventually undergo changes over a period of time.
Answer d. Regeneration is the ability to replace the lost or damaged body parts. Regeneration is defined as the reconstruction of external appendages and internal organs that got injured. Injury is rapidly followed by complete, successful re-growth of the lost parts. Plants can regenerate all body parts from the precursor cells.