Alternating current electricity. This allowed electricity to flow further than Edison's first DC approach.
Railroads - allowed for transportation of materials to growing small cities, and large cities to become larger.
Antibiotics and antiviral medicines. - stopping deadly diseases and bacteria from spreading. This helped with many problems that would normally terminate 33% of populated areas that are infected.
Answer:
The answer is 1) a chromosome
Explanation:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
I'm pretty sure it's earthquakes
I think the answer is false!
Answer:
Option A.
Organisms in the deepest part of the ocean come up to the surface to breath.
Explanation:
- Abyssal zone is the part of the ocean towards the bottom. It consists of 83% of the ocean.
- The zone is completely dark. There is no sunlight striking this zone so the organisms which require sunlight are not found here.
- The organisms like sharks and deep sea fish in this zone have to reach above them for breathing dissolved oxygen as this zone has no such plants to produce oxygen.