Answer:
The correct answer is: <em>C. Increased average lifespan to 78 in the US.</em>
Explanation:
Science has impacted human health by increasing the average lifespan to 78 in the US. Over the last couple of decades, the life expectancy of Americans has increased significantly than what it was 200 years ago. This can be attributed to:
1. Vaccinations- Since the invention of vaccinations, diseases such as tuberculosis, cholera and polio which were major causes of death 200 years ago have virtually been eradicated in the US.
2. Abundant and safer foods available- Commercial and large scale farming has made a wide variety of nutritious foods easier to obtain.
3. Improved sanitation- Safer drinking water, sewage treatment and stricter food inspection has significantly reduced the rate of illnesses due to poor hygiene and sanitation.
In these ways, science has impacted human health by increasing the average lifespan to 78 in the US.
Organisms that obtain energy by eating other organisms are called consumers. They are organisms like animals and fungi.
Answer:
The Full form of BT is Bleeding Time. The BT test determines how quickly a man's blood clots to stop bleeding.
Explanation:
Brainliest plzz
It can be performed on any lobe in the body eg thyroid lobe, heart lobe
Answer:
a) The mineral Quartz (silicon dioxide SiO2), is created by combining the elements silicon and oxygen.
b) Coal, from plant materials, and limestone (calcium carbonate CaCO3) created by corals and other sea creatures, are not minerals even though they are mined like many ores.
Explanation:
Quartz is a very hard mineral created by combining the elements silicon and oxygen. It is chemically stable and so weathers very slowly. The quartz crystal can be colored yellow, brown, black, milky white, rose, etc depending on the impurities in the rock at the time of formation. It is used in the production of optical instruments, various electrical devices, sandpaper, grinding tools, etc.
Coal is formed from the gradual accumulation of plant remains (peat) that are found in tropical wetlands. It is used as fuel for electric power generation, in blacksmithing purposes and to make coke.
Limestone is made up of skeletal fragments from marine organisms like corals, planktons, coralline algae, sponges, echinoderms, mollusks, foraminifera, etc. The shells of most of these organisms are made up of aragonite or calcite. When they die, the shells left behind are accumulated over millions of years and form limestone. It is used in the production of lime, used as a building material and filler in products like toothpaste or paints. It is also an essential component of Portland cement.
