Answer:
very little oxygen
Explanation:
the atmosphere would have very little oxygen as photosynthesis produces and releases a ton of oxygen into the atmosphere. in addition plants and animals would cease to exist as they both heavily rely on photosynthesis and cellular respiration.
The answer to this question is Vitamin D. Vitamin D is considered a vitamin and a hormone. Vitamin D can help develops the bones and teeth and it can also boost our immune system when a person have a sufficient amount of vitamin d in the body. Also vitamin d helps our immune system to resist diseases such as diabetes and cancer.
a)The pros of replacing zn2+ by cd2+ is that Zn metallothionein was able to efficiently compete with Cd2+, Zn2+ was restored to these proteins for the first time. When Zn2+ is exclusively coupled to Cys-thiolate in mammalian metallothionein, clusters are formed that are both kinetically labile and thermodynamically stable for the metal.
The cons of replacing zn2+ by cd2+ is Cd2+ damages kidney proximal tubule cells
b) Co and Zn can completely replace one another, with the possible exception of minor individual needs that can be satisfied
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