How do Archaeplastida reproduce?
The spores germinate and grow into a haploid gametophyte, which then makes gametes by mitosis. The gametes fuse to form a zygote that grows into a diploid sporophyte. Alternation of generations is seen in some species of Archaeplastid algae, as well as some species of Stramenopiles (Figure 1).
What is unique about Archaeplastida?
One of the fundamental and distinctive features of the members of Archaeplastida is the presence of the chloroplasts. They also lack centrioles and have mitochondria. They also have a cell wall and cellulose. The food produced from photosynthesis is stored in the form of starch.Jul 23, 2021
Why are Archaeplastida important?
The Archaeplastida are one of the major evolutionary lineages of photosynthetic organisms, and arguably the most important for animals, including humans, because the ancestors of one group (green algae and plants) was able to invade land and set the stage for the evolutionary movement onto land of many animal groups.
What type of protist is algae and why is it important?
Plant-like protists are called algae. They include single-celled diatoms and multicellular seaweed. Like plants, algae contain chlorophyll and make food by photosynthesis. Types of algae include red and green algae, euglenids, and dinoflagellates.Mar 5, 2021
Are Archaeplastida multicellular or unicellular?
Red algae typically exist as multicellular protists that lack flagella; however, they can also exist as unicellular organisms.May 27, 2022
Are Archaeplastida unicellular?
The Archaeplastida vary widely in the degree of their cell organization, from isolated cells to filaments to colonies to multi-celled organisms. The earliest were unicellular, and many groups remain so today.
Are Archaeplastida prokaryotes?
The Archaeplastida are the product of an ancient evolutionary partnership of a single-celled eukaryotic protist with a prokaryotic oxygen-producing photosynthetic bacterium (Delwiche, 1999).
How does green algae protist reproduce?
Reproduction of Green Algae
Green algae reproduce both asexually, by fragmentation or dispersal of spores, or sexually, by producing gametes that fuse during fertilization. In a single-celled organism such as Chlamydomonas, there is no mitosis after fertilization.
How do protists reproduce?
Protists have the ability to reproduce using binary fission. In binary fission, an organism duplicates its genetic material, or deoxyribonucleic acid, and then divides into two parts known as cytokinesis.
What are 3 ways protists reproduce?
For protists, they undergo three types of asexual reproduction. The majority of the protists reproduce through a process called binary fission. The other two types of asexual reproduction that protists undergo are multiple fission and budding.May 3, 2022
How do protists reproduce sexually and asexually?
These organisms generally opt for binary fission method of asexual reproduction wherein a single parent produces an off-spring without having to depend on fertilization by another organism. In other words, the parent organism literally divides itself into two cells.