I think it's d but I'm not sure!!
Answer:
3 materials
Explanation:
The jacket and trousers worn by a firefighter have to be constructed from materials that will withstand intense heat. Aramid fiber is a synthetic fiber that is highly regarded for its strength and heat resistance. Nomex is the trade name for arimid fiber clothing, and this type of material is used in the construction of a firefighter jacket and trousers. Nomex is often combined with Kevlar to increase the strength of the material.
Stem cell lookup presents remarkable promise for understanding basic mechanisms of human improvement and differentiation, as properly as the hope for new redress for illnesses such as diabetes, spinal cord injury, Parkinson’s disease, and myocardial infarction. However, human stem cell (hSC) research additionally raises sharp moral and political controversies. The derivation of pluripotent stem cell strains from oocytes and embryos is fraught with disputes about the onset of human personhood. The reprogramming of somatic cells to produce brought on pluripotent stem cells avoids the moral issues particular to embryonic stem cell research. In any hSC research, however, dilemmas arise involving sensitive downstream research, consent to donate materials for hSC research, early medical trials of hSC therapies, and oversight of hSC research. These moral and policy issues want to be discussed along with scientific challenges to make certain that stem mobile lookup is carried out in an ethically fabulous manner. This article affords a crucial evaluation of these issues and how they are addressed in contemporary policies.
Stem cells are the body's uncooked substances — cells from which all other cells with specialized functions are generated. Under the right prerequisites in the body or a laboratory, stem cells divide to shape more cells known as daughter cells.
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The hypothesis of Rodman and Mchenry's involves mainly in energetic efficiency moving between patches of forest, to the account for the success of the bipedal adaptation in early hominids.
Habitual bipedalism was not driven by the encephalization, but vice versa. Mchenry pointed out that the theories and origin of bipedalism has a significance and speculative, it is important because they are implicated in differentiation.
Let's think about this question and ask our selves what is life?
Think about a non-living thing, like a bike.
Does this bike have kids? Does it need to eat or sleep? What is it made up of? What does it need to survive? Does it need to be able to sense the environment around itself?
You're probably saying, no the bike doesn't do a lot of these things.
Humans, animals, and pretty much all living things need to perpetuate their genes by means of reproduction, whether it is asexual or sexual.
We need to animals need to eat and sleep, but you can just categorize this as a metabolic process. Plants need Nitrogen and CO2 and sunlight, to undergo metabolic processes and make glucose (another metabolic process). We also must be able to maintain an equilibrium while conducting metabolism (homeostasis).
We need to be able to sense the environment around ourselves to survive.
If you look at simple organisms, they are often able to detect different chemicals and know to be attracted or stay away from certain substances.
All living things are made up of cells.
