MARINE BIOLOGY
11th Edition
ISBN: 9781259880032
Author: CASTRO
Publisher: RENT MCG
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Chapter 6, Problem 2CT
Summary Introduction
To determine: The way by which a particular species described as “dark-red brown” algae could be analyzed and considered as a member of the Rhodophyta or of the Phaeophyta.
Introduction: Many fascinating photosynthetic organisms that have evolved from terrestrial vascular plants populate the ocean and marine environment. It carries many morphological features that originally suit with adaptations to terrestrial plants. However, they are not the members of the kingdom Plantae.
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Identify three major differences among the following divisions of algae: Chlorophyta, Phaeophyta and Rhodophyta. One of your differences must include the main character which was used to separate them into Divisions.
Character Character state seen in the division
1. Rhodophyta Chlorophyta Phaeophyta
2.
3.
Green algae are believed to be the ancestors of the bryophyte. Cite four distinct lines of evidence to support this belief.
Lichens are not in a mutualistic relationship with ascomycetes as some scientists beleive but are in a mutualistic relationship with cyanobacterium or algae.
true or false?
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- What is the difference between primary algae and secondary algae? Six major groups of algae? How are these groups classified into these groups, and what is unique about each group? What is the difference between diatoms and coccoliths found in algae. What is the difference between foraminiferans and radiolarians found in protozoa? What characteristics differentiate the protozoan groups (foraminiferans and radiolarians) from the algal groups (diatoms and coccoliths) microscopicly? Of what economic and academic value are algae?arrow_forwardYou are diving off the coast of an island. Since you are a very good diver, you can go quite deep. Once you stop descending, you look around at the life forms. You notice what you think is an algae. Knowing what you know about algae and their ability to undergo photosynthesis, what phylum of algae are you most likely looking at? -Phylum Bacillariophyta -Phylum Chlorophyta -Phylum Phaeophyta -Phylum Chrysophyta -Phylum Rhodophytaarrow_forwardPolysiphonia is characterized to have a triphasic type of life cycle. Triphasic is one of the four types of life cycle generally exhibited by algae. The other types are haplontic, diplontic and diplohaplontic. Describe each life cycle and diagram the stages to differentiate one from the other. Give examples of algae that exhibits them.arrow_forward
- Algae are autotrophs and can have photosynthesis, however, evolutionary evidence suggests that plants shared a common ancestor with only green algae and are closest relatives of Charophytes. What evidences support this statement? How an algal cell is different from fungal cells, even if both are eukaryotes? Why slime mold is a protist not a fungus even if it does not have chloroplast?arrow_forwardChara is an unusual alga. What type of cell division do members of Charophyceae undergo—division with a phycoplast or phragmoplast? What is important about their flagella? Do true plants (especially those with xylem and phloem) have flagella? (Hint: THink sperm cells in ferns and cycads.)arrow_forwardEukaryotic cells can be detected at latest mid-way through the Proterozoic, and multicellular eukaryotes not long after – but there is a curious lag before the radiation of multicellular eukaryotic groups. We discussed two possible reasons for this. Explain both. Why might an early arrival of lichens on land explain aspects of both of those possibilities?arrow_forward
- What is the brown pigment in brown algae called?arrow_forwardFungi were once classified in the same kingdom as plants. Which characteristic of fungi resulted in them being placed in a separate kingdom?arrow_forwardA student is using a Venn Diagram to communicate understanding of the similarities and differences between fungi and animals. The student placed key characteristics in each circle and classmates are asked to review the work. Qurdtion options: “You should remove ‘has a cell wall’ because neither fungi nor animals have a cell wall. “You need to move the term heterotroph to the ‘animals’ circle because fungi can be heterotrophic or autotrophic.” “You have all of the information correct.” “All animals only reproduce sexually so you need to move ‘may reproduce sexually or asexually ‘to fungi only.”arrow_forward
- In a culture of hyphae of unknown origin, you notice that the hyphae lack septa and that the fungi reproduce asexually by using clumps of erect stalks. However, at times sexual reproduction can be observed. To what group of fungi would you assign it?a. Chytridiomycotab. Basidiomycotac. Ascomycotad. Zygomycotaarrow_forwardLichens are a mutualistic association of a fungus and either an alga or a cyanobacterium in which the fungus slowly engulfs the photosynthetic partner. the phototroph provides inorganic phosphorus to the fungus. the fungus helps collect sunlight for the photosynthetic partner. the fungus protects the photosynthetic partner from erosion.arrow_forwardDoes the biological species concept apply to lichens? Should lichens be given species names? On what criteria should two similar-looking lichens be classified as different species?arrow_forward
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