Edited Invalid date
21.3 Supergroup SAR -- Part 2
Zooxanthellae are dinoflagellates that form relationships with other organisms.
Zooxanthellae live within their hosts.
The dinoflagellates lack flagella.
Corals in the animal kingdom usually contain large numbers of zooxanthellae, which provide their animal hosts with organic nutrition.
The corals give the zooxanthellae shelter, food, and protection.
One of the most important groups of primary producers is the dinoflagellates.
A population explosion of dinoflagellates and other algae is called a algal bloom.
A single liter of water can contain more than 30,000 organisms.
The high density of the algae causes some blooms to turn the water brown or red.
Red tides can be seen from space.
A red tide is caused by a dinoflagellate bloom in southeastern Alaska.
A fish kill on Padre Island, Texas, can be the result of a dinoflagellate bloom.
Half of the parent's plates are passed on to each daughter cell.
The daughter cells act as gametes and form a diploid zygote during sexual reproduction.
After entering a resting stage, the zygote undergoes meiosis.
The product of meiosis is a single haploid cell.
The protists are single-celled.
They are the most complex and specialized of all the organisms.
The barbed threads that are discharged by trichocysts are useful for defense and for capturing prey.
The poisons are released by some trichocysts.
Ciliates are the most complex of the protists.
Take note of the oral grooves, gullet, and anal pore.
Sexual reproduction called conjugate occurs occasionally.
The non-digestible reagent is eliminated through the anal pore after the digestion.
The ciliates range in size from 10 to 3000 um.
The majority of the ciliates are free living, mobile, and single celled.
They are one of the largest single-celled organisms.
Ciliates have two types of nuclei, a large macronucleus and one or more small micronuclei.
The normal metabolism of the cell is controlled by the macronucleus.
During sexual reproduction, two ciliates unite and exchange haploid micronuclei.
The fusion of the micronuclei results in the dissolution of the macronuclei.
An apicoplast is a unique organelle that is used to penetrate a host cell.
There are parasites of animals and some of them can spread.
When the cells burst and release toxic substances into the blood, there are chills and the symptoms of Malaria.
Malaria kills more than half a million people each year.
In densely populated, tropical areas of the globe, Malaria is the most common disease.
Half the world's population is at risk for the disease because of its prevalence in these areas.
There are other human parasites.
In the United States, there have been cases of cyclosporiasis caused by contaminated fresh fruits and vegetables.
In pregnant women, the parasites can cause birth defects and intellectual disability, and in AIDS patients, it can cause neurological problems.
rhizarians are no longer classified as a unique supergroup.
A test is a skeleton of Foraminiferans and radiolarians.
The tests of foraminiferans and radiolarians are beautiful.
The calcium carbonate test is often multichambered.
The pseudopods extend through openings in the test.
In the radiolarians, the glassy Silicon test has a radial arrangement of spines.
The pseudopods are not inside the test.
When a geological upheaval occurred, there were so many fossilized shells that they became a large part of the White Cliffs.
The pseudopods extend out through the openings of the shell.
View flashcards and assignments made for the note
Getting your flashcards
Privacy & Terms