According to Charles Darwin's theory of Evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
(n.d.). Retrieved from http://www.nas.edu/evolution/Definitions.html
One word answer:Adaptation:
A for you'res but for mine the answer was
Its absence would affect many organisms in the community
Answer:The correct answer is chordates
Explanation:
Organism in the phylum Chordata develop dorsal nerve cord in their embryonic stage. Development of dorsal nerve cord is the characteristic feature of these animals and is developed by the mesoderm layer. In many of them they are only present in embryonic stage.
In vertebrates notocord disappears after completion of embryonic stage and is replaced by vertebral column which provide support and anchor to the body structure of vertebrates.
Tunicates are chordates and have dorsal nerve cord only in prenatal stage and it disappears in adults.
Drugs and other chemicals are examples of how environmental factors affect gene expression. These drugs can either 'activate' or 'inhibit' the expression of genes that you have. For example, taking drugs while being pregnant affects the genetic makeup of the baby inside you.
