Vitamin A deficiency is the leading cause of preventable blindness in children.
...unless environmental changes occur. These probable environmental changes could influence the supply of food, the condition of shelter and the environment to sustain life and support the population.
Similarly, our surroundings are our environment. The social and economic situation of a person is influenced by all environmental influences. It results in progress or positive change in the society and nation's social, economic, and cultural components. Peace and security are brought about by development.
Answer:
They each have vestigial structures.
Explanation:
Birds and humans have a common ancestor as they have homologous structures.
Vestigial structures are the organs that have some important functions in the past but now in present, they do not perform any function.
Both humans and birds have vestigial structures such as humans have an appendix and ear pinna and wings of flightless birds such as ostrich.
Hence, the correct answer is "They each have vestigial structures.".
Answer:
The evolution of the Eukaryote cell is most likely involves the endosymbiosis of an smaller bacteria that might be aerobic bacteria by a larger bacteria.
Then this smaller bacteria must remain in symbiotic association with the larger bacteria and it must evolve in organelles like chloroplast or mitochondria and the larger prokaryotic cell must be evolved in an Eukaryota cell.
This theory is called endosymbiotic theory and is supported by the similarities of organelle like chloroplast and mitochondria present in eukaryotic cells with prokaryotic cells.
