Rifting events:
• crustal up-warp,
• rift valley (linear-shaped lowland between several mountains)
• linear sea,
• ocean
Development of the rift starts when the upper part of the lithosphere starts to extend. Extension leads to the development of isolated basins. Major rifts occur along the central axis of most mid-ocean ridges, between two tectonic plates.
Answer:
a) Teeth arose from the rough scales of ancestral sharks.
b) Skeletal developments leading to the amphibian movement onto land probably evolved from lobe-finned fishes.
d) The anterior gill arch formed the basis for the evolution of the vertebrate jaw.
Explanation:
The animals we know today have physical characteristics that are evolutionary adaptations of characteristics of their ancestors, which have undergone a series of evolutions and modifications over the years giving rise to new species that have resulted in the species we know today. This process of evolutions and adaptations also happened with the ancestral species of fish, which allowed that today, they had characteristics such as teeth and jaws. Many of these evolutions occurred even in different species, such as the evolution that allowed the amphibians to have a skeleton, which evolved from the spine fins of fish.
It's the process of excretion: Which it's PRIMARY function is exchanging oxygen and carbon dioxide.
The atom becomes a negative atom, i believe :)
