Euglena is an example of a protist that:?

Question

A. is both autotophic and heterotrophic
B. is only a parasitic heterotroph
C. swims away from light
D. is always autotrophic

Answer 1

A. is both autotophic and heterotrophic

Euglena: autotrophic in sunlight (chloroplasts) and heterotrophic in dark.

Answer 2

Euglena are famous for being one of the few organisms that are both autotrophs (they use photosynthesis to make glucose) and heterotrophs ( in this case, using phagocytosis to ingest food particles)

the answer is A. If the euglena always swam away from light it wouldn't need chloroplasts to go through photosynthesis. It is not parasitic, and is not always autotrophic.

Answer 3

Probably C.

Euglenoids, also Euglenoid flagellates, common name for microscopic, unicellular organisms such as the genus Euglena, common in freshwater habitats but sometimes found also in marine environments. Some euglenoids are colonial, some are parasitic. They constitute the order Euglenida in the class Phytomastigophorea, subphylum Mastigophora, kingdom Protista. Traditionally, euglenoids have been treated as algae, or simple plants, because they frequently are photosynthetic. Zoologists, however, have often considered them simple animals because they can swim actively and because some feed like animals. Some photosynthetic species can also obtain nutrition by alternate means.

A typical euglenoid has a pair of flagella, or whiplike appendages used in swimming, at the front end. It also executes a kind of crawling movement by changing the shape of its body. An eyespot enables it to move toward or away from light. Photosynthetic euglenoids contain several organelles, called chloroplasts, that give them a greenish color. Some euglenoids feed by absorbing dissolved substances, and many can ingest larger materials such as other euglenoids. The animals reproduce asexually by fission, or dividing in two, and little evidence of sexual reproduction exists. Therefore the 800 named “species” of euglenoids probably are not equivalent to the interbreeding populations that represent species in sexual organisms.

Answer 4

To make things simple for you, let me write a few lines.
The eyespt allows light from a particular direction to strike it. Euglena moves toward the light of certain intensity. This enables it to enhance photosynthesis..Chloroplasts store food produced by photosynthesis during the day. In the dark, it absorbs organic nutrients from the surrounding water, and lives as a heterotroph..Those species that are devoid of chloroplasts, are total heterotrophs and ingest food by phagocytes.

So, the answer to your question is A

Answer 5

Well.....I know that euglena usually swim towards light rather than away. So that leaves C out.

And heterotrphs eat organic matter (rather than manufacturing it from sunlight).

But, I don't know what they mean by "parasitic heterotroph" or autotrphic.

good luck with this one...

Answer 6

A. They're pretty famous for having chlorophyll -- but, in the absence of light, they'll get energy by being predators.

Answer 7

a is correct answer it behaves in light like a plant and in dark as an animal.

Answer 8

i think its 'a' but im not really sure.......

its definiely not 'b' or 'c'

Answer 9

D