Answer:
rocks and sediments, while the rest is located in the ocean, atmosphere, and in living organisms.
Explanation:
carbo is found in these places for example:
Answer:
I think it is D
Explanation:
Plants are all of the above (I,II,III) but fungi are heterotrophic, but other than that they have a cell wall in their eukaryotic cells and are multicellular, so it is most likely D.
Answer:
Blood clothing is an example of positive feedback.
This type of feedback mechanism is useful to the body because it multiplies the factor that intervenes in clotting accelerating the process.
If a toxin affects the molecules that signal for platelets the feedback will not be effective enough to produce clotting and the body will keep bleeding.
Explanation:
Blood clotting is an example of positive feedback due to the fact that when the vascular endothelium is damaged platelets will go to this area and activate themselves once they are in contact with the collagen fibers of the damaged structure. When the platelets are activated they will release the contents that is stored in their granules. One of the contents is a Gq-linked protein receptor cascade, that will increase the concentration of calcium in the platelets. Calcium activates protein kinase C, which, in turn, activates phospholipase A2 (PLA2). PLA2 will modifies an integrin membrane increasing its affinity to bind fibrinogen. The activated platelets change their shape , and the fibrinogen cross-links with the integrin membrane aiding in the aggregation of adjacent platelets. After this the coagulation cascade takes place. there are two pathways the extrinsic and the extrinsic one.
The extrinsic pathway will be activated due to tissular factor released by the platelets and the intrinsic pathway will be activated due to endothelial collagen. The final product of both pathways is factor x.
Factor x will transform prothrombin into thrombin will activate the conversion of fibrinogen into fibrin. Thrombin will form a net of fibrin that will the clot.
A cascade reaction is useful because every component of the cascade are related making a quick reaction once that one of then is activated and can activate other or more factors.
If a toxin affects the molecules that signals for platelets, platelets will not go to the damaged area and in consequence there will not be thrombin and fibrin to form the clot together with platelets.
Answer:
C
Explanation:
E.g. length of day or season , weather
There is absorption of carbon dioxide
by the oceans through physicochemical (air-sea surface exchange) and biological
processes. During physicochemical process, molecules of CO2 get into the ocean
by diffusing into the sea surface waters and dissolving. Various factors such
as wind, sea surface mixing, concentrations of CO2, and the temperature of the
water influences the amount of CO2 that diffuses and dissolves in the ocean
surface water. Also, during biological processes, dead cells, shells and other
parts of dead organisms get decayed and releases carbon dioxide at the bottom
of the water.
