rve, and label its structures. 1. algu o p Drawing of Amoeba steh Paramecium -- Paramecia are quite large, straw-colored, slipper-shaped and move rapidly, and they are thus very noticeable. If there are Paramecia in your field of view you probably will recognize them immediately. Often, however, students do have difficulty both finding a Paramecium, and after they have found one, making it move slowly enough so they can study it at high magnification. The trick to finding a Paramecium is to scan the entire slide quickly using the scanning lens. Then, if you do not find one, make a new slide and search again. Often, Paramecia tend to move to the edges of the coverslip, and even "escape" the coverslip at its edges. The trick to slowing the Paramecia is to mix a drop of d methyl cellulose with a drop of the cell culture, as you did with Euglena. SumA od enimsxs inshogral Transfer a drop of Paramecium culture to a clean slide and add a coverslip. To add a coverslip to the drop, rest one edge of the coverslip on the slide next to the drop of water, and then carefully lower the coverslip over the drop so that the water flows between the coverslip and the slide without trapping air bubbles. Observe with the scanning lens and try to locate one or more cells for study. Refer to Figure 3.4 as a guide. Center a Paramecium in the field of view. Quickly switch to low power. With a little practice, you should be able to move the slide to keep the Paramecium in view. Note how rapidly the cells move and the way they spiral through the water. Observe the movement for some time. What happens when a cell encounters an obstacle such as debris from the culture medium?

Bacteria that cause the disease typhus arc close relatives of bacteria that evolved into __________. a. protists b. protocells c. chioroplasts d. mitochondria

Piotists with the capabilities to perform photosynthesis and to absorb nutrients from dead organisms are called _____________. photoautotrophs mixotrophs saprobes heterotrophs

A marine biologist analyzing water samples notices a protist with a calcium carbonate shell that moves by pseudopodia extension. The protist is likely to be closely related to which species? Fuligo septica (Dog Vomit slime mold) Circogonia icosahedra (Radiolarian) Eugiena viridis Ammonia tepida

Sudoriferous glands produce______. a. sweat b. lipids c. sebum d. milk

The sister taxon of the Chordata is the. Mollusca Arthropoda Ambulacraria Rotifera

Mitochondria most likely evolved by ___________ . a photosynthetic cyanobacterium cytoskeletal elements endosymbiosis membrane proliferation