<h3><u>Answer;</u></h3>
Vestigial Structure
<h3><u>Explanation;</u></h3>
- <em><u>Vestigial Structure are structures that have no apparent function and appear to be residual parts from a past ancestor.</u></em>
- Vestigial structures are normally homologous to structures that are functioning normally in other species and therefore may be considered evidence for evolution.
- Other examples of vestigial structures include; the human appendix, the pelvic bone of a snake, and the wings of flightless birds.
Answer:
agriculture
Explanation:
agriculture is the practice of farming.
<span>Nervous system is a network of specialized cells that monitors the internal and external environment and initiates commands through which the body reacts.
Nervous system is very important part of our body because it is the system which is controlling our body. If there is no nervous system we could not perform any function. It sends the message to and from the brain to all parts of body.</span>
The correct answer is air pollution
Phytoplankton refers to the microscopic marine species that thrive at the bottom of the food chain. They obtain their energy from carbon dioxide via photosynthesis, like plants and thus are very essential in carbon cycling.
Phytoplankton forms the base of almost every ocean food web. Thus, it can be stated that they make the majority of other ocean life possible. They are the source of food for zooplankton and small fishes, as well as for larger animals like jellyfish and whales.
Thus, if the population of phytoplankton gets declined, it will indirectly affect other species in the aquatic ecosystem. It can also be said that with the decrease in the population of phytoplankton, the population of other major species in the ecosystem also gets a decline.