Answer:
is a constructed copy of an object that represents that object. It can be larger than the object, smaller, or the same size. They can have moving parts, have water flowing through them, or even be robotic. They are used for experiments, visualization, or for education in museums and so are incredibly useful to scientists and nonscientists alike.
Explanation:
Answer:
- Chimpanzee : probes to obtain insects, Spears to kill bush babies
- Capuchin monkey : stones for nut cracking, stones used to dig for food
Explanation:
The Chimpanzee are a type of Mammals known to be very strong from the age of Five. they hunt down other larger mammals using spear and stones. it has been observed in Africa when Chimpanzees were making spear out of sticks in order to kill bush babies in the forest.they also use twigs to probe /obtain insects.
Capuchin monkeys are a type of monkey with similar characteristics with other types of Monkeys who live in the wild, they eat fruits and nuts and they used stones to dig up hard to get food from the ground and from back or roots of trees.
Answer:
Blood-brain barrier.
Explanation:
Blood brain barrier may be defined as the barrier between the blood capillaries and the component of the brain tissue. This blood brain barrier provide protection against the pathogens present in the blood.
The blood-brain barrier uses tight junctions that prevent the entry of microbes in the underlying tissue. The tight junctions allows only the entry of some selected particles and prevent the entry of other particles.
Thus, the correct option is (3).
Keplers 1st law of planetary motion states that the planets have an elliptical orbit, with the sun at one focal point of the ellipse.
Answer:
Hypothesis: If mucus production in the submucosal layer of the esophagus is insufficient, cell longevity is affected, because it interferes with the quality of connective tissue.
Explanation:
In a scientific research the hypothesis is an assumption, a possibility that will justify the purpose of the scientific research and will help in the establishment of all the steps of this research, so that it is possible to determine if the hypothesis is true or false. In other words, we can say that the hypothesis must be formulated as an assumption, before the research that will prove it or not.
An example of a hypothesis about research on the longevity of cells that line the esophagus is: "If mucus production in the submucosal layer of the esophagus is insufficient, cell longevity is affected, because it interferes with the quality of connective tissue."
