Answer:
The correct answer is "uranium-238".
Explanation:
Uranium-238, is the most abundant isotope of the element uranium. Uranium-238 has not enough nuclear force to balance electrostatic forces between protons, and as a result, it is a radioactive isotope and its losing energy because of the spontaneous breakdown of its atomic nucleus. Uranium-238 has a half-life of 4.5 billion years and is used as fuel in nuclear reactors as well as for dating purposes.
Answer:
The right response is "Natural killer".
Explanation:
- Natural killer cells constitute immune cells which could also identify and ultimately destroy distressed or damaged cells. This might also target cancerous as well as tumors.
- That alone reduces inflammation that lyses this same cell cycle rather than being amongst the very first cells towards prepare an inflammatory system, and even more so towards virus cells, participating including its destruction.
I believe the answer is C.
because when the dinosaurs thrived they ate most of the mammals which were small animals but when the dinosaurs went extinct the mammals grew larger in size and started to thrive.
Answer:
Symbiosis
Explanation:
Termites are the important insects due to its role in in nutrient recycling in the terrestrial ecosystems. Termites eat wood. The wood contain cellulose, a complex carbohydrate which is cannot be digested by most insects such as termites. For the breakdown and digestion of wood is carried out by the microorganisms present in the hindgut of the termites. The microbes live in the gut as a symbiont. The microbes break down cellulose into simple sugars and fatty acids which are easily absorbed into the cells of the termites.
