Answer:
1.) stromatolites
2.) photosynthesis
3.) Ordovician
4.) Cambrian
5.) oxygen
6.) As Earth cooled, carbon dioxide dissolved in the early ocean. Cyanobacteria consumed carbon dioxide and converted it to oxygen. Methane was removed from the atmosphere as oxygen was produced, eventually leading to the Cambrian Explosion.
7.) Metabolic processes that use oxygen produce more energy than anaerobic metabolism. Simple diffusion of oxygen would limit the size of a multicellular eukaryote, but animals evolved ways to transport oxygen to their tissues, which permitted an increase in size.
Explanation:
From Penn
Answer:
Most treatments for cancer use radiation to target the cancerous cells (tumor) and blast radiation in that direction. Because we cannot control the radius of the radiation, other cells are also blasted with radiation and causes sickness in cancer patients.
Explanation:
In the cells with nucleus, as in eukaryotes, the cell cycle is also divided into three periods which are: Interphase- the mitotic (M) phase, and cytokinesis. During interphase the cell growth accumulating nutrients needed for mitosis preparing it for cell division and duplicating its DNA
Answer:
rapid burial of vast amounts of vegetation
Explanation:
The organic matter is always decomposing, just that it depends on the conditions at what kind of a rate the decomposition will happen. If the climate is warmer and humid, then the decomposition is very quick. This results in a rapid burial of enormous amounts of vegetation. As the vegetation dies out, it piles up constantly, decomposes very quickly, and if there is something that can cover it, like mud for example, it will be buried in the ground. This is actually how the big deposits of coal have got the basis to form in the Carboniferous period.
CENTRAL NERVOUS SYSTEM INCLUDES THE BRAIN AND SPINAL CORD.
