EVERYDAY SCIENCE

SCIENCE

ZOOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which protist has an eyespot?
A
Amoeba
B
Volvox
C
Euglena
D
Paramecium
Explanation: 

Detailed explanation-1: -Euglena gracilis is a protist that has animal and plant-like characteristics. Because of its eyespot, Euglena exhibits phototaxis.

Detailed explanation-2: -Euglena also have an eyespot at the anterior end that detects light, it can be seen near the reservoir. This helps the euglena find bright areas to gather sunlight to make their food.

Detailed explanation-3: -Euglenas and their relative are motile, single cells that also have both plant and animal traits. They contain chlorophyll like plants, but lack cell walls like animal cells. Some have a red eyespot and most are equipped with one or more whip-like flagella for locomotion. Foraminifera are also amoeba-like protozoa.

Detailed explanation-4: -Traditionally, Euglenas were classified under Domain Eukarya, Kingdom Protista, and Phylum Euglenozoa (sometimes Euglenophyta). However, it is widely recognized that Protista is not a natural grouping. Currently, Euglena is classified in the Kingdom Excavata.

Detailed explanation-5: -We also learned that all protists are surrounded by a cell membrane, which is a fluid protective layer that helps to separate the cell from its external environment, and that some protists even have an eyespot, which is an organelle that helps them detect light so they can head toward or away from light.

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