Short Biology Questions Assignment Example | Topics and Well Written Essays - 500 words

Short Biology Questions - Assignment Example Studies also contend that, heavy asteroid stones broke dinosaurs’ backs besides other animals rendering them lame and unable to survive. Presently, palaeontologists refer to this collision as Asteroid Theory owing to its significant impact that yielded to an immense destruction of both the animal and plant life. This contributed to the evolution of other competitive life forms that could cope effectively with the altered environment, hence Charles Darwin’s argument â€Å"struggle for survival†. Scientists contended that the rampant volcanic eruptions evidenced 65 Million years ago prompted to the extinction of plant and animal life. Primarily, this was evident in Mexican and Indian regions where the lava produced covered numerous plants prior leading its way into the sea to destroy dinosaurs’ inhabitance (Benton 64). In addition, volcanic eruptions deposited obnoxious gasses into the atmosphere where thick dust hindered sunlight from reaching the planet’s surface for photosynthesis purposes. This action deprived other life forms especially the animals their necessary food, which led to their mass demise and evolution of other animals that could endure the then harsh conditions. The body cavities’ evolution bears an intriguing history in the kingdom of animalia due to constant altering surroundings where the animals had to adapt effectively to survive. Acoelomates phyla possess a secondary body cavity but it is comprised of either circulatory or digestive functions. In some instances, these phyla possess body civilities comprising both the digestive and circulatory functions instead of bearing a single type (Benton 64). Pseudocoelomates have developed body cavities but their characteristics are far from the true secondary cavity or coelom. Mainly, Worm-like life forms usually characterize these phyla. Eucoelomates mainly bear true coelom owing to