algae and protozoa

Algae can be referred to as plant-like organisms that are usually photosynthetic, but do not have true roots, stems, leaves, vascular tissue and have simple reproductive structures. They are distributed at planktonic, benthic and neustonic and in moist situations on land. The algae have chlorophyll and can manufacture their own food through the process of photosynthesis. Algae nutrition is autotrophic or heterotrophic. Algae reproduction is by asexual which is fragmentation, spores and binary fission and also sexual reproduction. In sexual reproduction we have isogamy and heterogamy.  Isogamy no structural distinction between male and female gamete. In contrast, heterogamy2 different type of gamate are produce which is male gamete and female gamete.

Characteristic of algae from different division:

1)chlorophyta

Most chlorophytes are aquatic, but some green algae can live on the surface of snow, on tree trunks, in soils, or symbiotically with protozoans, hydras or lichen-forming fungi. Green algae have chlorophylls a and b and store starch as a food reserve inside their plastids. Their cell wall made up of cellulose. They have sexual and asexual reproduction. Example: chlamidomonas

2)charophyta

They found in fresh to brackish water.Their green color comes from chlorphylls a and b.

3)euglenophyta

They have chlorophyll a and b .storage product is paramylon. Reproduction occurs by longitudinal cell division. Most live in freshwater. The most characteristic genus is Euglena, common in ponds and pools, especially when the water has been polluted by runoff from fields or lawns on which fertilizers have been used.

4)chrysophyta

large group of eukariotyes algae commonly called golden algae, found mostly in freshwater.
Chrysophytes contain chlorophylls a and c, which are masked by the accessory pigment fucoxanthin, a carotenoid. Example:diatoms

5)phaeophyta

Like the chrysophytes brown algae derive their color from the presence, in the cell chloroplasts, of several brownish carotenoid pigments, as fucoxathin. With only a few exceptions, brown algae are marine, growing in the colder oceans of the world.

6)rhodophyta

phylum of the kingdom protista consisting of the photosynthetic organisms commonly known as red algae. The red pigment=phycoerythrin , blue pigment=phycocyanin.

7)pyrrhophyta

They are unicellular found in marine and freshwater. They have chlorophyll a and c, carotenoids and xantophylls. Mostly they have 2 flagella which is longitudinal flagellum and transverse flagellum.

the toxic algal produce neurotoxin and it is also use for biofuel production.

PROTOZOA

Protozoa are a diverse group of mostly motile unicellular eukaryotic organisms. protozoa were defined as unicellular protists with animal-like behaviour, such as movement.. the unique features of protozoa is actoplasm,endoplasm,pellicle,nucleus and vavuoles. Protozoa are chemohterotroph which is holozoid nutrition and saprozoic nutrtion. For locomotion they have pseudopodia , flagella and cilia. For production there are asexual and sexual. In asexual there is binary fission while for sexual is conjugation. Binary fission result in two identical cells while conjugation is conjugation of 2 ciliates. Protozoa are classified into sarcomastigophora, labyrinthomorphora,apicomplexa,microspore,ascetospora,myxozoa and ciliophora. Sarcomastigophora are flagellates and amoebae and also have single type of nucleus.

 Apicomplexa are sporozoan with lack of locomotion organells. 

The last one is ciliophora are the largest phylum that use cilia as locomotory organelle.