Answer:
Because that is when oil and other harmful fumes to ecosystems first started appearing, and they did not care about animals back then as much, an example could be when they sprayed pesticides to kill weeds but instead almost killed a huge bird population. Most marine animals did not start dying and becoming endangered species until we did many oil spills into the ocean.
Explanation:
hope this helped i want to be a marine biologist when i graduate uwu
The immune system, when coming in contact with a new foreign entity, (Introduced by the vaccine), will first digest the foreign entity with white blood cells to determine its molecular makeup, the white blood cell will then proceed to construct specific antibodies t that will cling to the antigens of the invader, this will help the body know what is foreign and what is friendly! now, after you have fought an infection, your body will set aside certain cells called memory cells, these cells can live for weeks to years within the Lymphatic system as dormant cells, however, if the invader were to show itself again, the antigen presence from the invader would trigger the dormant memory cell to become active and mass produce the antibodies specific for that strain of infection. therefore preventing the show of symptoms due to the early warning system now in place.
Hope this helps! :D
Answer:
plants
Explanation:
because animals can maybe poop or pee on the water .and also people are the same too.so plants are the least likely to cause water pollution
Answer:
If red blood cells are placed in a 0.3 M NaCl solution, there is little net osmotic movement of water, the size and shape of the cells stay the same; the NaCl solution is isotonic to the cell.
Explanation:
