Explain the different types of barriers that could cause a species to survive?

The instructions are to chose two essays of 300 to 350 for each essay. Use APA formatting and citation . All essays have points that must be answered in detail for you to solve the primary question. these are the essay topics you can choose from.Essay topics 1.The topic of the hour is crucial and critical to address at this time, Cornaviridae 19 is taking a toll globally, but our country is seeing some of the highest death rates in the world. You are a group of young scientists, and you must answer these questions to begin the development of a vaccine.Include in your answer the following items;A.Why is an RNA virus is considered virulent as a DNA virus, or is it?B.Are viral symptoms are due to direct cause by viral contact to the body cells, or is it an immune response? C.What is the difference between an endemic versus a pandemic? D.List eh criteria and does this viral infection contain all the factorsE.What aspect of an RNA virus makes it more likely than a DNA virus to become an emerging virus? Does this apply to Coronoviridae-192.What if you observe two different species in the same field and you know that they are not known to interbreed. One species feeds and mate in the treetops and the other on the ground. But in captivity, the birds interbreed and produce viable, fertile offspring. a.What type of reproductive barrier mist likely keep these birds separate in nature?b.Explain the different types of barriers that could cause a species to survive?c.What barriers are detrimental, or are any obstacles create beneficial events?d.Could these barriers cause genetic drifts, bottlenecks, or founder’s effects?3.Plants have been our pictorial history of evolutionary changes. a.Do these transformations reveal the importance of the past to understanding the future of a species?b.What might be some beneficial evolutionary changes that we can observe in plants?c.Are these changes able to support the Darwinian theory of natural selection?d.Make sure you supply examples with your answers.5.What are the critical factors that plant’s use for adaptations for acquiring resources to ensure the survival of that species?a.Describe what the elemental, molecular as well as the energy needs of plants that allowed the organisms to colonize land are. b.Discuss the evolutionary changes that proceeded from the species beginning as algae to vascular plants. c.How beneficial were they, and did they also influence any structural changes.d.Choose a plant and describe how these adaptations allowed the plants to survive, such as flower, shrub, or a tree. 4.Flowering plants are critical and central to the survival of many species on this planet. The continuation of the flowering category of the plant domain is the foundation of how we can survive. So we know that plant reproduction must take place, but we must know HOW do plants choose the asexual or sexual pathway.a.Explain the evolution of asexual versus sexual reproductive mechanismb.Is one more beneficial than the others?c.What are the signals that a plant will receive to initiate the chosen biochemical pathway for either asexual or sexual reproduction?