What do you mean <span>It has been observed that certain species of insects which had not previously caused significant harm have become serious pests. the best explanation for this phenomenon is that the pesticide killed off predators which had previously held this species in check. a mutation occurred in the species. the pesticide increased the vigor of the species. was able to be used by the pest as an additional food source is also a reproductive for some insect species. </span><span />
A. Ancestors of whales may once have been able to walk.
Answer:
Competition between two species happens when both species are using the same resources in an area. This usually happens when a new species moves into the area of the current species. Competition leads to both species being harmed.
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Rotational movements need the most thoracic mobility. This is because a rotational movement (such as twisting) because the movements are more three dimensional, and this is where the most can go wrong. For example, if you were holding a 35lb child and simply bent forward to put him/her down, this is less likely to cause injury than if you were to twist your torso to the right and put the child down. There is a lot more spinal stability and mobility needed for the second motion than the first.
