Despite the fact that the various protists observed in this exercise belong to different eukaryotic lineages, what makes them all "plantlike" in nature?

Complete question: This can be seen in the attached file below. It's contains the various protists observed in the exercise.

For a eukaryotic organism to possess a plantlike characteristics shows its ability to manufacture its own food through the process of photosynthesis.

Explanation:

Protists are single- celled or unicellular organisms. They are made up of eucaryotic cells in which the cell structure is complex with a well - defined nucleus. Typical example if protists includes the following:

--> Volvox

--> Spirogyra

--> Euglena

--> Diatoms

--> chlamydomonas

Some protists are said to be plant like and are known as protophyta. Example of such includes Euglena, Spirogyra and chlamydomonas. This is because they have organelles called chloroplasts. This contains chlorophyll which enables them to make their own food through the process of photosynthesis. Photosynthesis is the process by which energy for sunlight is converted to high energy containing organic compounds such as glucose.

a sperm cell fertilizes an egg cell.

that scientist would be robert hooke