Answer:
Option D, a test for the presence of cells that contain DNA
Explanation:
As we know all living organisms are made up of cells and DNA is the basic genetic material that codes for protein and traits with an organism. If even a single cell with DNA is detected on the extraterrestrial planet then it will be clear that it has life on it or the environmental conditions are favorable to support life. Cells are microscopic and hence can be seen through microscope which can be installed easily on a probe.
Hence, option D is correct
A. external
These types of signals are observed when there is a cut on the body. The epidermal cells lose contact with one another and divide faster until they are in contact once again. After they come into contact, division slows down again.
Answer:
The three mains in the process of DNA replication are 1 initiation 2 elongation 3 termination.
Explanation:
Enzymes those function during initiation
1 Helicase.
2 single strand binding protein.
3 Topoisomerase.
Enzymes those function during elongation
a DNA polymerase alpha
b DNA polymerase delta
c DNA polymerase epsilon
Enzymes those function during termination
1 Replication protein A
2 Replication factor C
In experiments with phosphorus and sulfur, both of which burned readily, Lavoisier showed that they gained weight by combining with air. With lead calx, he was able to capture a large amount of air that was liberated when the calx was heated. To a suspicious Lavoisier, these results were not explained by phlogiston
