All food chains begin with producers
With an insoluble outer layer which remains in the cell where it is formed until the energy is needed
Microtubules are macromolecules that build both, cilia and flagella.
<span>Microtubules are cytoskeletal fibres that are formed by polymerization of α,β-tubulin and they are important components of cilia, flagella and some other cellular structures. Cilia and flagella are very similar in their organization, both have a central bundle of microtubules-axoneme. Axoneme is compound of nine outer doublet microtubules which surround a central pair of singlet microtubules. Even thought cilia and flagella are structurally similar, they are differentiated based on their function and/or length. Flagella are longer and the primary role of the flagella is locomotion. On the other hand, shorten cilia often has the function in sensing the extracellular environment.</span>
Skin is the first defense structure.
Answer:
The title should be C: <em>Humanity Spreads: Air Pollution and Deforestation</em>
Explanation:
<em>"Humanity Spreads: Air Pollution and Deforestation"</em>
This tittle refers to how fast the population is growing in every aspect and how it is affecting natural resources. People keep moving to the cities looking for a job, studies, or a better life quality. As this happens, cities increase in size, which implies more human activity, more air pollution due to transport gas release, or factories gas release. Water is also polluted. Deforestation also increases because new buildings are constructed in new areas, or because agricultural activity keeps expanding to new places. Deforestation is the cause of death of so many species, not only plants but also animals that use to have shelter and food in this vegetation. By deforesting air quality is also affected as trees are not able to produce gas exchange.
