<span>The process when you are carefully looking at an object or process is called an observation. The object is the primary source, from which with careful and active observation information is obtained. Observation can also include usage of instruments in order to collect the data.
Other term used for observation is monitoring. </span>
Positive feedback: breast feeding, giving birth, and blood clotting are two examples.
Negative feedback: Blood glucose levels, temperature control, and body temperature are two examples.
-Negative feedback: accumulation of an end product of a process slows that process.
-Positive feedback: the end product speeds up its own production. Regulation is important because without it we would bleed out from small cuts because we wouldn't be able to form blood clots. Or we wouldn't be able to form ATP. Regulatory mechanisms help us do the important tasks needed to sustain life.
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Sebaceous glands
In addition to its role as a protective barrier, sebum also has antibacterial properties, conferred by oleic and palmitoleic acids, as well as antioxidants, conferred inter alia by vitamin E.
The level of secretion of sebum differs from one individual to another and will be at the origin of different types of skin texture: Dry skin or brittle hair will be the consequence of a low secretion of sebum, while a skin or greasy hair will be the consequence of a greater sebum secretion known as hyper-seborrhea. This hyper-secretion of sebum can also be responsible for skin disorders such as acne.
Sweat glands:
The sweat glands, which contribute entirely to the secretion of sweat, the evaporation of it leads to the cooling of the skin and plays a large role in the regulation of body temperature. In addition to their role in regulating body temperature, they also eliminate some metabolic waste.
This means that the sweat they excrete is a hypotonic fluid derived from the filtration of blood plasma, composed of water and electrolytes, allowing thermoregulation through transpiration.
What about hairs:
Hair and hair in general are vestiges of evolution. Because the Australopithecus (our distant prehistoric parents of 3 million years ago) like most mammals have a fur whose main function is to help maintain a constant body heat in very cold weather.
In case of excessive cold, it is the brain that is affected first: hypothermia can have very serious consequences. The blood vessels irrigating the brain regulate its temperature. If these cool too close to the outside air, the brain will suffer because security systems such as narrowing vessels are limited.
Terrestrial planets are the 4 closest to the sun, so they are Mercury, Venus, Earth, and Mars
So the correct answer is A
A. Rate of growth of a seedling over two weeks.
