Answer: a. Quadrupled
Explanation: Environmental costs are costs related to the actual or potential worsening of natural resources due to economic activities such as producing, distributing, or consuming products or services. Put simply, environmental costs are something like the air is being more polluted as production increases.
Water, wood, sunlight, and wind are renewable because they are naturally replenished in a reasonably short amount of time. oil, natural gas, uranium, coal, and metal ores are non-renewable because they can't replenish itself at a sufficient<span> rate.</span>
Limestone.
It is a sedimentary rock composed of calcite and aragonite. It is used as a building material mainly because it is easily available and easy to work with.
Limestone is used in the manufacture of steel as it is the primary raw material that helps to remove impurities from the iron ore and produces waste matter that has low melting point and viscosity
Answer:I don’t know this one.
Explanation:but it should be a
The true statements about he T cell receptors are 1, 2 and 4.
T cell receptors are the molecules found on the surface of the T lymphocytes. V(D)J recombination is the unique mechanism of genetic recombination that occurs only in the lymphocytes during the early stages of T and B cell maturation resulting in the T cell receptors. They recognize antigen fragments bound to MHC molecules. Majority of the T cell receptors consists of an alpha chain and a beta chain and a few with gamma and delta chains. Each chain is composed of a variable and a constant region. Within these chains are the complementary determining regions (CDRs) which determine the antigen to which the T cell receptor will bind.