A toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
In my opinion, I think that coal is the most important mineral of all. It keeps us warm during winter and it helps train transport food and other goods that we need.
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Until now it is estimated U.S. coal production totaled about 9.1 million short tons (MMst) 27%lower than last year.
East of mississippi river totaled 3.7 MMst
West of mississippi river totaled 5.4 MMst
The supply of both types of coal is expected to decline as production from Appalachia falls from 201.5 million tons in 2018 to 170.1 million tons in 2020.
Answer:
I think
Abiotic natural capital comprises subsoil assets (e.g. fossil fuels, minerals, metals) and abiotic flows.
Biotic natural capital or ecosystem capital consists of ecosystems, which deliver a wide range of valuable services.
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Answer:
A pollen tube grows from the pollen grain into the ovary
Explanation:
Water is needed for fertilization in several plant groups because the sperm needs to swim to meet the non-motile eggs of the female organs.
<em>However in angiosperms, the pollen germinates and a structure known as pollen tube which contains the male gametophyte (sperm) grows into the ovary where the ovule is located and the male gametophyte is deposited in the ovule to initiate the fertilization process.</em>
<em>Hence, water is really not necessary for fertilization in the angiosperms.</em>
