The correct answer is D. Bird flu.
Polio and smallpox are very rare today as they were eradicated hundreds of years ago and TB has been around for maybe thousands of years. Bird f!u was discovered in 1957.
The kingdoms of living organisms that contain prokaryotic cells are bacteria and archaea. They are both unicellular. While the kingdoms of living organisms that contain eukaryotic cells are protista, fungi, animalia, and plantae. Protista is unicellular. Fungi could be unicellular or multi cellular while animalia and plantae are both multi cellular.
A spiral galaxy is a galaxy where the stars and gas clouds are concentrated mainly in one or more spiral arms. Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a concentration of stars known as "the bulge". The disk of stars orbiting the bulge separates into arms that circle the galaxy. These spiral arms contain gas and dust and younger stars that shine brightly before they dull. Most of the galaxies that scientists have discovered so far are spiral galaxies. One example of a galaxy in our solar system is The Milky Way. Spiral galaxies make up roughly 72 percent of the galaxies that scientists have observed. How the spiral arms form continues to puzzle scientists. One theory suggests the galaxy arms could be the result of density waves traveling through the outer disk. Galaxies at a whole are quite a fascination.
Answer:
Axon also called nerve fiber carries information away from the central nervous system
Explanation:
Neurons have their own structure whose main parts are the nucleus, cell body, and dendrites. There are many connections between neurons thanks to axons or small branches.
Axons help create a network whose function is to transmit messages from neuron to neuron. This process is called a synapse, which is the joining of axons to pulses with a velocity of 0.001 seconds.
1. the carboxylic acid group which contains carbon and oxygen
2. the amino group, which contains nitrogen and hydrogen
3. the r group which varies with each amino acid
