Options are not provided in the question. The complete question is as following:
Non-photosynthetic species of Euglena are sometimes classified as which of the following?
a. zooflagellates
b. sarcodines
c. water molds
d. pyrrophytes
Answer:
a. zooflagellates
Explanation:
Zooflagellates are non-photosynthetic flagellates which lack cell walls or plastids. The mode of their feeding is by phagocytosis or endocytosis.
Non-photosynthetic species of Euglena are consider as Zooflagellates. Zoomastigophora is a phylum within the kingdom Protista. some of the diseases caused by zooflagellates includes African Sleeping Sickness. they have a spherical, elongated body with a single central nucleus and form a symbiotic relationship with other organisms.
Hence, the correct option is a.
The layers above would be not as old and the layers below would be the older layers.
Statement D. Is not true.
Not always because there could be birth defects, mutations, or other variables.
