Answer:
(4) all scientific explanations are tentative and subject to change and improvement
Explanation:
<em>As new facts or findings emerge about a topic, previous explanations about the topic change or are improved on. That is why findings from researches do not become a theory overnight until they have been tested by several independent researchers.</em>
Even when findings become theories, emergence of overwhelming counterclaims concerning the findings often result in change of the theory. A good example is found in Dalton's atomic theory which claimed that atoms are the smallest indivisible particle of elements. The theory was later disproved by the emergence of the fact that atoms contain proton, neutrons and electrons.
Hence, it is concluded that all scientific explanations are tentative and subject to change and improvement as new facts emerge.
<span>The oesophagus is the muscular tube in humans and most other vertebrate organisms that carries food from the pharynx, or throat, down to the stomach. It is lined with a thick, moist pink tissue called mucosa.</span>
<span>The life cycle of plants with seeds in flowering is characterized by the pollination of insects but this is not part of the life cycle characteristics of plants with seeds that do not flower. The Polonization of insects has a specific process through certain groups of insects that pollinate the plants when they are of seeds that bloom.</span>
if I remember correctly I'm pretty sure all cells have a nucleus
Answer:
B. Kidney
Explanation:
The kidneys play a central role in the regulation of arterial blood pressure. A large body of experimental and physiological evidence indicates that renal control of extracellular volume and renal perfusion pressure are closely involved in maintaining the arterial circulation and blood pressure
