Question

1. list 1 similarity and 1 difference between diatoms and euglena: a) similarity: b) difference: 6. although both paramecium and stentor eat bacteria for food, they go about it in very different ways. briefly describe how the structure of each cell relates to its behavior: a) paramecium b) stentor 7. euglena has an eye - spot that allows it to detect the presence and intensity of light. why would this eye - spot be important for the survival of euglena? 8. categorize the observed protists as either animal - like or plant - like. animal - like plant - like part c: comparing prokaryotic cells to eukaryotic cells 9. what are three differences you see between the bacteria observed in the bacteria types slide and the paramecium? a) b) c)

Explanation:

5.
a) Similarity: Both diatoms and euglena are single - celled eukaryotic organisms.
b) Difference: Diatoms have a cell wall made of silica (frustule), while euglena lacks a rigid cell wall and has a flexible pellicle.
6.
a) Paramecium has cilia all over its body. These cilia create water currents to bring food (bacteria) towards the oral groove, which is related to its feeding behavior of capturing and ingesting bacteria.
b) Stentor has a large trumpet - shaped body with a ring of cilia around its oral end. The cilia generate currents to draw in bacteria and other food particles into its large oral cavity.

1. Euglena is photosynthetic. The eye - spot helps it detect light, which is necessary for photosynthesis. By moving towards areas of optimal light intensity, it can produce more food and survive better.
2. Animal - like protists: Paramecium, Stentor. Plant - like protists: Diatoms, Euglena.

9.
a) Bacteria are prokaryotic with no nucleus, while Paramecium is eukaryotic with a well - defined nucleus.
b) Bacteria are generally much smaller in size compared to Paramecium.
c) Bacteria often have a simpler structure without complex organelles like the contractile vacuoles present in Paramecium for osmoregulation.

Answer:

5.
a) Both are single - celled eukaryotes.
b) Diatoms have silica cell wall, euglena has flexible pellicle.
6.
a) Cilia create water currents for feeding.
b) Ring of cilia around oral end for feeding.

1. Helps in finding light for photosynthesis.
2. Animal - like: Paramecium, Stentor. Plant - like: Diatoms, Euglena.

9.
a) Bacteria are prokaryotic, Paramecium is eukaryotic.
b) Bacteria are smaller.
c) Bacteria lack complex organelles like contractile vacuoles in Paramecium.