Technically speaking, an intrusion is any formation of intrusive igneous rock; rock formed from magma that cools and solidifies within the crust of the planet. In contrast, an extrusion consists of extrusive rock; rock formed above the surface of the crust.
hope this helps bye~glori
It’s b because its shown in the question read it again ,and you’ll see
Answer:
The mutations occur at a rate of 0.56 base changes every 1 billion years. If this rate stays consistent, the mutation rate can be used to determine when different lineages of a particular species split
The best answer is "d" - the overuse of antibiotic. Emerging disease are those whose incidence has increased in the past two decades or threatens to increase in the near future. Such diseases include : 1. Old infections emerging as a result of antimicrobial resistance due to indiscriminate or poor use or over use of antibiotics. 2. New infections resulting from evolution or change of existing organisms. 3. Previously unrecognized infections in areas undergoing ecological transformation 4. Known infections spreading to new geographical areas or population. Antibiotic resistance has been on the rise and is now major concern.