Concept explainers
To determine: The evolutionary significance of a choanoflagellate.
Introduction: Chloroplasts are the organelles that are necessary for photosynthesis. They are found exclusively in plant cells and some cells of algae. They contain the pigment chlorophyll that is used for driving the process as it contains various proteins that convert carbon dioxide into carbohydrate molecules.
Explanation of Solution
Pictorial representation: The figure represents the phylogenetic relationship between red, green, and brown algae.
Fig.1: The phylogenetic relationship between red, green and brown algae
The autotrophs are the organisms that can synthesize their food by the process of photosynthesis. They harvest the energy from sunlight and convert it into usable form carbohydrate cause glucose. The autotrophs include plants, some bacteria, and algae. The algae are of three types depending upon the pigment present in their chloroplast. These three groups are Phaeophyceae, Rhodophyceae, and Chlorophyceae. The green algae Chlorophyceae is known to give rise to land plants that are modern-day photosynthetic organisms.
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Chapter 28 Solutions
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- Among the two diagrams, what is the most parsimonious tree? Are they equal? Why or why not?arrow_forwardWhat is the phylum and genus of the plant shown here? What is the name of the T-shaped structure on the right? What type of nuclear division takes place in the T-shaped structure on the right? (CUFAC) Phylum? Genus? OU What is the name of the T-shaped structure on the right? What type of nuclear division takes place in the T-shaped structure on the right? [Choose ] [Choose ] [Choose] [Choose ] < <arrow_forwardWhat genes from the mitochondrion are also used for phylogenetic analysis? Can you name and describe atleast 2 genes?arrow_forward
- Construct the data matrix From the DNA sequence data from the 5 taxa. (Hint: there are three variable nucleotide sites, which are the characters) Map all three characters onto both mypotheses using two Colors (same as in Activity 6). 3 position 111111 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 ATTGCGGCCTGTATG Taxon A Taxon B ATGGCGGGCTGTAAG Taxon C ATTGCGGGCTGTATG Taxon D ATTGCGGGCTGTAAG Taxon E ATGGCGGCCTGTATG 1 Determine the treelength of both hypotheses and fill in 3 the treelength and Justify Text minimum number of changes in the table on the lower right. Then compute the CI for both hypotheses and put a checkmark or X to indicate which one is the most parsimonious and which one is the most accurate. 4 Character/ states Taxon A Use the most accurate phylogeny to infer the origin of the new fungal pathogen Taxon B Hypothesis Treelength Minimum CI Most parsimonious Most accurate Taxon C Taxon D 1 taxon taxon A taxon B taxon C taxon D taxon E Taxon E Minimum 2 origin Florida (new) Mexico China…arrow_forwardMake your molecular phylogony of the 6 mushroom species with given character matrix. (I also gave you the DNA sequence give to me which is how I made the character matrix)arrow_forwardYou give a good overview of sexual and asexual reproduction in fungi. However, which one is more advantageous? and if one is more advantageous... why would the fungi use both types of replications? Again, your prompt is fair, but it is quite uncertain if you are telling which are favorable conditions and why... you do tell us that genetic variation is only possible under unfavorable circumstances. However, is this strategy due to evolution and fitness? or is it just because of circumstances given under the chance factor?arrow_forward
- Phylogenetic with branch lengths scaled in genetic distance 0.88 0.88 0.93 0.78 2388-3883 232 2002 4⁹29930 9823-2883 0.8 0.82 0.89- Mycobacterium tuberculosis Lineage 2 0.99 2001 90-2004 4484 2005 -0.635 388627805 718356883 11 2002 -83331-9811 74333-2690 $250-2010 10737 2002 203 2001 1511 208201 4701810 2008-2011 6295 29889 8073_2007 0.01 (# substitutions/nucleotide site) 83922889 015 2005 98507_2009 8195 200 46828000 Root-to-tip distance Evolutionary distance from root-to-tip versus sampling time 2.8x10 2.2x10 R²=0.00 1990 1995 2000 00 000 80 2005 000 O oo XBOO8 1. In this figure you can see a phylogenetic tree of samples of Mycobacterium tuberculosis lineage 2 and a corresponding root-to-tip plot. The branch lengths in the tree are scaled by evolutionary/genetic distance, so not by time. In the plot on the right, the summed branch lengths going from the root to the tips of the trees are then plotted against the dates the tips were sampled. What can we conclude from these figures? The…arrow_forwardGiardia is a protozoan parasite that lacks mitochondria. Based on the figure below, what could be the explanation for this. Explain your reasoning.arrow_forwardPlease answer fastarrow_forward
- In the green algae studied, where in the life cycles does the chromosome number change from haploid to diploid, and vice versa?arrow_forwardIdentify: 1. A part of the chloroplast in the green algae important in carbon dioxide fixation and for production and concentration of starch. 2. Subgroup of Kingdom Viridiplantae with cytokinesis marked by phragmoplast formation. 3. Subgroup of Kingdom Viridiplantae with centrioles and closed mitosis. 4. Chloroplast morphology of the Chlamydomonas. 5. The characteristic life cycle of Chlamydomonas. 6. Sexual reproduction in Chlamydomonas characterized by the fusion of morphologically similar gametes. 7. Sexual reproduction in Volvox characterized by the fusion of a large, immotile female gametes with small, motile male gametes. 8. The common name of the genus Chara. 9. The specific structure that produce the male gametes in Chara. 10. The specific structure that produce the female gametes in Chara.arrow_forward39arrow_forward
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