Read pages 128130 in your textbook and fill in the blanks Protists Protista is the "catch all" Kingdom which contains many organisms which seem unrelated to each other What do they have in common? Most are all ________________, but some are multicellular. Cells are ________________ they have a nucleus Reproduce asexually through ___________________, but some exchange DNA through sexual reproduction There are two main groups of protists that we will discuss: plantlike and animallike. Plantlike Protists These protists are called "plantlike" because they have chlorophyll, which is important in the process of _________________________. These organisms convert energy from the ______________ in order to survive, just like plants. One main example of plantlike protists is green, brown, and red ____________. These organisms are __________________________. Algae grows in ________________ environments, such as in water, on rocks, in soil, and on lower parts of trees. A common example of algae is seen growing on rocks in the water. Another very common example is seaweed. Many Important Uses: through photosynthesis, they produce 80% of world's ______________ food source for ____________________ and in ecosystems source of vitamins and minerals oil resources https://www.youtube.com/watch?v=d5laQZbJ2mg&noredirect=1 algae can use corn waste as nutrient to grow algae stores food as ___________ naturally, dead algae sink to the bottom of the ocean and over many years, are converted into crude oil deposits companies are now using high heat and pressure to make algae into oil quickly algae could be our main source for _________ in the near future!! photosynthesisanaerobic humans oxygen moist oil unicellular eukaryotic aerobic algae multicellular sun phagocytosis binary fission fuel Oct 2910:07 PM 1 Animallike Protists (Protozoans) Read pages 128130 in your textbook and fill in the blanks These are singlecelled eukaryotes. Protozoans need to be able to get around and therefore, have methods to help. Protozoa are classified by how they move. There are three possible ways protozoa can move around: ___________________ some protozoa have these temporary fingerlike appendages which help them move and also catch outside food particles These organisms are called _________________ An example is an __________________ _______________ some protozoa are covered in tiny, hairlike structures that help them move These organisms are called _______________ An example is _____________________ ______________ some protozoa have one or more tail like structures to help them move These organisms are called _______________ An example is __________________ These organisms do not use photosynthesis to get energy instead, they must engulf and/or absorb nutrients from outside the cell. This can either be done by simply passively absorbing nutrients through the cell membrane or actively through a process called __________________________. 1. Cell surrounds outside food particle and internalizes it 2. ________________ uses digestive enzymes to break apart the food particle 3. Nutrients are distributed to the cell 4. Waste products are expelled phagocytosis Paramecium lysosome amoeba flagellates ciliates pseudopods flagella cilia amoeboids Giardia Oct 308:29 PM 2 Pathogenic Protozoans Many protozoans can cause serious disease in humans. Often, these infections are difficult and painful to treat. Recall that protozoans are __________________. What kind of cells make up our body? That's right, we are also ____________________. This means that any drugs that are used to target the protozoan infection might also attack our cells. Examples: Giardia causes Beaver Fever and colonizes in the intestines causes severe cramps, nausea, malnutrition, and diarrhea and can be fatal if untreated contracted by contacting contaminated feces prominent everywhere but is a problem in developing countries where clean water is sparse Trypanosoma causes sleeping sickness begins with fever, chills, nausea, but soon develops into lasting nervous system damage it is fatal transmitted through tsetse fly bites in Africa The most dangerous and prevalent protozoan parasite is _________________, which causes malaria. https://www.youtube.com/watch?v=JwsoK8O0lXE 1. Plasmodium undergo sexual reproduction in the mosquito to form ____________________. 2. An infected mosquito bites a _________________ and passes the sporozoites into the blood stream. 3. Sporozoites travel to the ____________________ where they change into merozoites. The liver cells rupture and enter the blood stream. 4. The merozoites invade and reproduce in ____________________________. 5. Red blood cells burst and release sporozoites back into the ________________________. 6. A mosquito takes a blood meal and ingests the sporozoites. 7. The cycle continues. Plasmodium liver cells red blood cells sporozoites human eukaryotes eukaryotes blood stream Oct 309:08 PM 3 So if we know how to treat malaria AND it can be prevented, why is it still such a big deal? https://www.youtube.com/watch?v=SF242mxtZN8 Class Discussion: What have we learned about malaria in Africa? Economic Challenges Scientific Reasons complex lives half in mosquitoes and half in humans both environments are trying to fight it off, but the Plasmodium survives cold blooded and warm blooded environments Do the mosquitoes die 14 days and they die living in tropic areas, it's easy to create good environments for the mosquitoes mosquitoes like to breed in moist areas malaria is more common in poorer regions why? may not have screens or doors on their houses work outside all day farming rather than inside > get bit more no roads to deliver drugs, no refrigerators or power to keep the drugs cool if you have malaria, you can't work = no income malaria is worst during harvest season Cultural Problems: malaria is a lifestyle , just like the cold and flu to us Malaria in pregnant women it is passed on to the baby not taken seriously like us in Canada not wearing bug nets for West Nile why don't they just wear the bug nets at night?! Oct 3010:21 PM 4 Homework 1. What is the main feature of plantlike protists? 2. What are three ways that algae are helpful to humans? 3. Explain the four steps of phagocytosis. 4. Why can protozoan infections be difficult and painful to treat? 5. A peregrine falcon in Washington state was diagnosed with malaria. It was thought that this was a unique case until the disease was found in other birds of prey. a) How do you think malaria was transmitted to the falcon? b) If malaria is transmitted to some bird species, what could this mean for humans? Oct 3010:26 PM 5
© Copyright 2026 Paperzz