Answer:
A. Many dinosaurs were present in upper layers of rock strata, but not in lower layers.
Explanation:
In my opinion, this is the best possible answer.
<span>They belong to the same genus and to different species.</span>
"Memory Cells", are cells responsible for remembering what and how to fight off a specific pathogen. When a memory cell is produced for a specific pathogen, you are granted long lasting immunity.
Answer:
Cancer research have shown much advancement in terms of cure and longevity of the patient as time progressed.
Explanation:
Some milestones of advancements in Cancer research are:
- The process of immunotherapy has shown significant result and boosted immunity against cancer.
- The medicines of immunotherapy in regards to cancer include checkpoint inhibitors.
- Another achievement is monoclonal form of antibodies that precisely target the cancer cells
- Adoptive transfer of cells, this method have shown promising results in leukemias and lymphomas.
- The modulators such interleukins and interferons that activates the immune cells against cancer.
- Vaccines against some forms of cancer.
- Genomic approach to cancer treatment.
- The commonest chemotherapy and radiotherapy act against cancer in the same way.
a because the cycles restarting
