Why do biologists classify red and green algae with land plants?
Red and green algae are photosynthetic and are thus autotrophs. Otherwise, they are aquatic and (in the case of green algae) can be unicellular. But these are similarities that are not sufficient to define algae as true plants. All plants in the Kingdom Plantae are multicellular and terrestrial (ancestrally terrestrial in the case of waterlilies). Green algae are important in the study of plants as they show the base of the plant kingdom, hinting at what a common ancestor to the whole kingdom may have looked like. In particular, the charophytes are probably close to the common ancestor of all land plants. Thus, in the study of land plants, green algae can be considered the most recently diverged outgroup. And, earlier still, red algae diverged.
Chlamydomonas is a genus of green algae, which are in the Plant kingdom. Land plants evolved from green algae, but major genetic differences still exist between land plants and green algae. As such, you could classify Chlamydomonas as a plant cell. However, Chlamydomonas species do things that most plants do not, such as swim.
Depends on the algae. Roughly speaking (this is not exhaustive), these are some of the major algal groups: Green algae - Aquatic relatives of plants. Red algae - Similar to green algae, but containing a red pigment. Brown algae - Many-celled aquatic algae, including kelp. Golden algae - Single-celled "plants" that form glass shells around them. Also called diatoms. Fire algae - Flagellate algae that whirl around when swimming. Also called dinoflagellates.
Green algae belong to Kingdom Protista. Green algae is a very diverse type of algae. Actually, green algae is sort of similar to plants. The green algae contain two forms of chlorophyll and capture light energy to produce sugar in similar with the plant. However, unlike the plants the green algae are aquatic. The species are named algae because they are aquatic and make their own food.
Many scientists believe that ancient green algae evolved into land plants. The chloroplasts present in green algae are the same as those of land plants. In addition, green algae have cell walls of similar composition to land plants; both store food, such as starch, in the same manner. Most green algae live in freshwater habitats with highly variable conditions. The ongoing changes in their environment have made them highly adaptable. http://www.answers.com/topic/what-evidence-has-led-scientists-to-believe-land-plants-evolved-from-green-algae
Green algae is a primitive form of plant. It IS a plant WRONG!!!green algae is a protist don't put it on the internet if you know it isn't right. Actually, some forms of green algae are now classified in the Kingdom Plantae right along with green land plants. For example, the Divisions Chlorophyta and Charophyta are considered plants. Both of the above answers are incorrect in that the first one is too inclusive (not all…