Students in ms. johnson’s class were using the microscope to study organisms found in a sample of pond water. one student found this specimen: stentor. this protist is relatively large. according to the scale, we would expect stentor to be about a) 2 centimeters b) 200 micrometers c) 400 millimeters d) 600 micrometers

The correct answer is option D

The protists are the kingdom that has organism which neither lies in the category of animals nor in plants. These are different from plants and animals.

Stentor protists fall into the subgroup of the protozoan. They are single celled organisms but some of them can be seen through the naked eyes because of its size.  

Some Stentor grows upto 0.6-2 milimeters in length. (600 micrometer-2000 micrometer).This is a unusual length of protozoans that can be seen without microscope else other protozoans cannot be seen without microscope.

answer; hypnagogic sensations)

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.