Answer: option A - tumor-suppressor gene
Explanation:
A cancerous tissue is growing or spreading rapidly at a harmful rate. However, for a tissue to become cancerous, its "internal guard" usually known as a TUMOUR SUPPRESSOR GENE must have lost or reduced its function.
This loss of function occurs after mutation.
So, definitely, all affected individuals with cancerous tissues have mutated tumour suppressor genes unlike unaffected individuals.
Note that other options are WRONG, because none of them accurately distinguishes affected from unaffected individuals
Answer: Competent cells are able to take up naked DNA, they occur naturally and can be created in the laboratory
Explanation: Competent cells are cells that can modify its genetic make up and take other DNA using transfomation. Competent cells are commonky made from e.coli because it can replicate faster, readily available for use. DNA is cleavedusing restriction enzymes making up sticky ends.
The correct answer is C.
As we can see in the graph above, there is a great difference in survival of moths of different colors in different habitats ( light and dark trees).
Light moths are more successful on light trees than the dark moths, the dark moths have higher survival rates on the dark trees.
But, the difference in survival rates is greater on dark trees than in the light trees.
As we can see, the dark moths have an almost 100 % survival rate on the dark trees, compared to around 70% for light moths on light trees.
Therefore, we can conclude that the dark moths on the dark trees are the most successful.
They're plant cells. The green organelles should be chloroplast. They're responsible for photosynthesis.
