Sara, a class 9 student was asked to submit a project report on mosquito transmitted disease in school. she visited a nearby hospital where her aunt was staffed as a nurse. her aunt took her to a patient suffering from malaria sara talked to the patient and asked him about symptoms 1. name the causative organism and the vector of the disease 2. name the two symptoms which may have been told by the patient 3. identify an important value shown by sara

Malaria is a disease caused by the Plasmodium parasite (which is a protozoan). These include P. falciparum, P. vivax, P. ovale, and P. malariae. The female Anopheles mosquito transmits the parasite since it feeds on the animal blood for the nourishment of its eggs.  The parasites destroy the red blood cells in the blood.

Symptoms of the disease include; excessive sweating, fever, headaches, vomiting, shivering, occasional seizures. In severe cases, symptoms will include impaired consciousness,  prostration, convulsions, and clinical jaundice.

She showed the value of initiative. Initiative is acting on your own to add value to your work without the request or push from your superintendent (or in this case, the teacher). Sarah makes the extra effort to do her own research into the project. This is rather than asking for mere answers  

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!