Answer:
Ralph is looking at a vein (likely a muscular vein).
Explanation:
Of all three great types of vessel present in vertebrates (arterial, venous, lymphatic), only veins and lymphatic vessels may normally contain valves. This is an essential feature of vessels which present low pressure flow, since it ensures that such flow is unidirectional.
Since blood cells are not typically found in lymphatic vessels, the vessel in question can be assumed to be a vein.
The negative impact of youth risk behavior considers the risks to youth health and the protective behaviors of health including smoking, drinking<span>, </span>drug use<span>, diet and physical activity. Depending upon one's social circumstance including the location of upbringing and access to education, the risk to health would increase, this could be affected by economic factors, with negative health impact increasing with the less access to resources. This directly impacts on the physical and mental well-being of an individual, with bad diet and lack of physical activity limiting a person's potential in the socioeconomic sphere and confidence and health.</span>
Marble is a metamorphic rock.
Marble is a metamorphic rock, that forms when limestone (another rock) reaches a certain pressure and heat. It's composed of mostly calcite, and some other minerals like pyrite, quartz, iron oxide, and granite.
Over several years, marble is supposed to wear down from acid rain/weathering.
Answer:
Microbiology - Study of very tiny living thing.
Zoology - Study of animals.
Ecology - Study of living things and environment.
Botany - Study of plants.
Explanation:
The branch of science which deals with the study of very tiny living thing i.e. microorganism is called Microbiology.
The branch of science which deals with the study of animals is called Zoology.
The branch of science which deals with the study of living things and environment is called Ecology.
The branch of science which deals with the study of plants is called Botany.
