Answer:
The correct answer is option 3. a nucleus.
Explanation:
The first genetic material present in the early organisms were RNA which was present in the microscopic organisms back then 3.5 billion years ago which means it is normal to have RNA in such microfossils chemical analysis.
Since, the nucleus was not present in early life forms of prokaryotes like bacteria. so, it is unusual to find nucleus in the fossils of stromatolite rocks.
Thus, option III is the correct answer.
<u>Answer:</u>
Genetic disorder that can result when sister chromatids fail to separate properly is likely to occur in meta-phase (m-phase) because in mitosis during m-phase there is separation of DNA to two equal halves.
<u>Explanation:</u>
- Genetic disorder is the problem that is caused by the abnormal activities in gene.
- This is also called mutation which may cause due to error during replication of DNA and also due to some environmental factors such as radiation exposure, smokes.
- So, during meta-phase, genes might not separate and genetic disorder might happen.
I think the answer is C. If correct please give me brainliest because I am almost to expert and I need 6 more brainliest answers because I have all the points all I need are the brainliest.
