B replaced because it takes place when water dissolves the original hard parts and replaces them with mineral matter.
Answer:
3D printing is ushering in a new era of efficiency, cost-effectiveness and convenience in the medical industry. ... As the technology evolves into a more practical and efficient system, so also will drug manufacturing, organ transplantation and other fields of medicine
hope that i helped
The changes will occur in an aquatic ecosystem as a result of nutrient loading are: changes in natural flow regimes as a result of water extraction and supply direct modification or destruction of important habitats barriers to the movement of plants and animals. For example within rivers and between rivers and their floodplain effects of poor water quality competition from introduced, <span>exotic animal and plant species. </span>
Any information provided has to be factual, not opinionated, to be reliable.
with this being said, the second choice would be the reason why her work is not reliable
Answer:d.are eventually replaced by electrons from photosytem 11
Explanation:there are two photosystems in the photosynthetic process.PSI and PS II. PS I has a reaction center called P700 because it's chlorophyll has a maximum absorption of 700nm wavelength.PSII has a reaction center called P680nm for similar reason.when an excited electron is transferred to P700,it becomes excited.this electron is passed down from from acceptor to another, until it is used to reduce NADP+ to NADPH.this electron is replaced when P680 gets excited by a photo of light and splits water to release electrons , protons and Oxygen
