Vertebrates have a bilateral symmetry due to which their entire body is divided into right and left halves while the invertebrates either have radial symmetry or the bilateral symmetry. Therefore, option D is correct.
The other basic differences between the vertebrates and the invertebrates are that vertebrates have a spinal cord and a backbone while invertebrates lack them, vertebrates have well developed brain, lungs or gills in respiratory system and closed circulatory system.
Plasmodium is the agent of malaria. It is like a parasite because it lives in its host, in its case the mosquito.
It has three stages of life cycle. 1) gametocytes ; 2) sporozoites ; 3) merozoites
<span>As gametocytes, it lives in the bellies of a female anopheles mosquito. They develop and change into sporozoites. After becoming sporozoites, they migrate to the salivary glands of the mosquito. As the female mosquito feeds, the sporozoites are injected into the host. The sporozoites make their way to the host's liver and change into merozoites and attack the red blood cells of the host.</span> Thus, the beginning of malaria.
<span>Stimulating production of IgG to combine with antigens. In immunotherapy, injected antigens stimulate production of high levels of IgG, which acts as a blocking antibody by combining with the antigen before it can combine with the cell-bound IgE antibodies. This therapy does not block cytokine release, prevent mast cellsensitization, or change the maturation process of T cells</span>
Answer: 1. Headwaters 2. Floodplain 3. Cargo 4. Tributary 5. Keelboats 6. Delta 7. Locks 8. Watersheds 9. Steamboat 10. Silt
Explanation: Hope this helps:)
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