Stars Like the Sun. When the core runs out of hydrogen fuel, it will contract under the weight of gravity. ... The upper layers will expand and eject material that will collect around the dying star to form a planetary nebula. Finally, the core will cool into a white dwarf and then eventually into a black dwarf.
In evolution, the study of vertebrate forelimbs is related to anatomical evidence.
Pollution and the o-zone.
First, a complete digestive system means that the digestive tract has a beginning or the oral end and the opposite end or the aboral end. This is found in more complex animals starting from roundworms (flatworms have an incomplete digestive tract). A closed circulatory system is found in animals more recent than mollusks. The presence of the coelom makes it more evolved than the flatworms.
Specifically, a small animal with a segmented body, short stiff appendages, and soft skin with the above characteristics point out to the phylum Annelida or annelids.
The answer is; Carbon dioxide levels in the Earth’s atmosphere have been steadily increasing.
Data has shown a direct relationship between the increase in the levels of carbon dioxide in the atmosphere and rising global temperatures. The rise in the global temperatures can be observed through the melting of Arctic and Antarctic glaciers, the rise in ocean levels, and extreme weather events.
