Water abandoned in swimming pools often turns green. If you examined a drop of this water with a microscope, how could you tell whether the water contains protists and, if so, which group they might belong to?

You are studying amoebas and paramecia, two different single-celled protozoans. You have at your disposal a standard white light (known as "bright-field") microscope, a fluorescence microscope, a scanning electron microscope, and a transmission electron microscope. For each of the following studies, indicate which type of microscope would be most useful. Items (6 items) (Drag and drop into the appropriate area below) Take movies of unmanipulated cells swimming or crawling in a drop of water. Categories View three- dimensional images of the outer surface of a paramecium, including cilia. bright-field Drag and drop here View cytoplasmic streaming (movement of organelles within the cytoplasm) in a paramecium. fluorescence Drag and drop here Stain and visualize chromosomes and mitotic spindles in dividing amoebae. Visualize ribosomes in the cytosol and mitochondria of amoebas. scanning electron Drag and drop here Use labeled antibodies to locate and make color images of lysosomes in both…

An autotrophic protist, such as a diatom or a dinoflagellate, can evolve into a heterotrophic protist (and therefore a protozoan) simply by losing its chloroplasts. Under what conditions might this take place?

Give some characteristic of brown algae.

Protists are more closely related to each other than they are plants, animals and fungi. false true

How would you distinguish protists and members of their kingdoms?

Select TRUE or FALSE to best describe the statements below, relating the events of the cardiac cycle. Keep in mind that these events may be chemical, electrical and mechanical. atrial pressure is greater than ventricular pressure while semilunar valves are оpen ventricular pressure is greater than atrial pressure when the atrioventricular valves are closed atrioventricular valves are open during ventricular emptying the end diastolic volume of the ventricles is reached before ventricles contract 1 ventricular filling occurs before depolarization of the atria 1 atrioventricular valves and 1. TRUE 1 semilunar valves are closed at the beginning of ventricular systole 2. FALSE end systolic volume increases when more blood empties from the ventricles the greatest pressure is reached in the ventricles while they are emptying the right atrium depolarizes before the left atrium ventricular depolarization occurs during the T-wave semilunar valves are open during ventricular filling ventricular…

Identify the type of lichen shown in the picture: Source: Heather Dietz Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a b Foliose с d Crustose e Fructose Fruiticose Platiose

Some red algae are coralline. What do you mean by this statement?

Why can red algae grow at deeper depths of water than green algae?