Answer:
I think a is the awnser because it makes the most sense
Mutation causes change in an organisms DNA, resulting in a change in all aspects of the organisms life. It affects how the organism looks, and how it behaves. If there was no mutation, an organism could not change, therefore there wouldn't be evolution at all.
Answer:
The correct answer is option A, that is, keratin.
Explanation:
Keratin refers to a protein that belongs to one of the families of fibrous structural proteins. It is the essential structural substance that forms nails, hair, horns, feathers, external layer of the skin, and hooves. It is the protein, which safeguards epithelial cells from stress or destruction. Keratin is tremendously insoluble in organic solvents and water.
C. Motility --> Listeria is motile (tumbles over each other in microscope), whereas Corynebact. is non-motile
**Both: Gram (+) rods, catalase (+)
Other tests: Nitrate reduction and sugar fermentation
Earth was formed after the Big Bang Theory. The rocks in space collided together to form into a planet size ball. Flash Forward to a years and years later, the earth is producing its own water and storms. it also produces its own nature (trees, grass, organisms, etc.).
Hope this helped