Uranium-235 is used. All of the isotopes of the element Uranium are radioactive, but Uranium-235 is the one commonly used. Some also use the radioactive isotope Plutonium-239.
Answer:
elliptical
Explanation:
Curious enough, the smallest galaxies are also the elliptical types. The oldest and farthest galaxy ever discovered is an irregular type of galaxy called GN-z11. It is 32 billion light-years / 9.8 billion parsecs away from us. It is estimated that the galaxy formed just around 400 million years after the Big Ban
Answer:
The chromosome wouldn’t be able to replicate
Explanation:
Without an origin of replication, the chromosome could not be copied prior to mitosis.
Genetic variation can be defined as the difference in the DNA sequences between the individuals in the population
<u>Explanation:</u>
- Antibiotic resistance in bacterial populations is caused by natural selection of bacteria that inherit mutations that make them resistant to the antibiotics,this sentence describes the source and preservation of genetic variation.
- The Mutation is one of the genetic variation or disorder, and probably bacteria choose mutation to become repellent to antibiotics
- In some of the cases of spontaneous bacteria have been obtained from other sets of bacteria through the process and make the bacteria repellent to an antibiotic.
- They survive antibiotic treatment and increase in numbers by natural selection.
- Natural selection can be stated as the process in which organism survive and reproduce adapting to the environment
Answer:
echinoderms
Explanation:
echinoderms are a group of aquatic invertebrates but they are only found in salt water
