Answer:
Evolution refers to the change in the structure of an organism with the passage of million of years.
Explanation:
Evolution is the change in the structure of an organism with the passage of million of years. Evolution occurs due to two reasons, first from genetically while the other from adaptation to the environmental conditions. In genetically, the change in structure of animal comes from their parents whereas changes occurs due to adaptation of an organism in order to survive in the harsh climatic condition of the environment.
Answer:
Composite volcanoes are explosive, towering giants. Shield volcanoes quietly produce broad, massive structures through lava flows. Cinder cone volcanoes are the smallest and simplest, but still pack a volcanic punch. A caldera is a large depression formed when a volcano erupts and collapses. Lava plateaus are extensive areas of flood basalt which are formed by the extensive eruption of basaltic lava over a large area.
Explanation:
Answer:
Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere. At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.
Explanation:
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.
The parents could be worried about birth defects that could affect the baby negatively and I don’t know the second part
The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants
