The answer is C because it’s something that can be caused by speciation, not can cause it
Heya!
So, the radiation from a fire warms the bottom of a pot. Through conduction, the water inside the pot is warmed. Finally, through convection, the hot water rises and less hot water sinks, forming a motion similar to that of a circle.
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To determine the reason for the fish death, do the following:
1. Test the water for the presence of organic substances that may be poisonous to the fish.
2. Test the dissolved oxygen concentration of the lake at different locations and at different depths.
3. Perform full toxicological examination of the lake to determine if any pollutant or poisonous chemical is present in the lake.<span />
The first invertebrates to show both segmentation and a complete digestive system belong to the phylum Annelida that includes earthworms, leech, sandworms, etc.
These segmented worms have complete digestive system which is also known as tube-within a tube. These can be found in freshwater, marine water or can even be terrestrial.
It should be based on the principles of immunology to understand this phenomenon: the immune system produces antibodies against an antigen that it does not possess
The AB group contains the A and B antigens on the red blood cells, so it can not produce anti-A antibodies or anti-B antibodies since it already possesses antigen A and B (otherwise it will develop autoimmunity).