Indicate whether the following traits are convergent (evolved independently), or
ID: 198698 • Letter: I
Question
Indicate whether the following traits are convergent (evolved independently), or homologous (share a common evolutionary origin) based on hypotheses presented in lecture. Mark “C” for convergent traits and “H” for homologous ones.
1. Cell walls in a cyanobacterium vs. cell walls in red algae (Rhodophyta) 2. Flagella in the bacterium Escherichia coli vs. flagella in a dinoflagellate aryotic alveolate protist) 3. Flagella of parasite Giardia lamblia (a diplomonad of the Excavata or Discoba e) vs. flagella of human sperm 4. Oxvgenic photosynthesis in a kelp (brown algae) vs. oxvgenic photosynthesis iin ip (a flowering plant) 5. Carbohydrate-conducting trumpet cells in a kelp (brown algae) and carbohydrate lucting phloem tissues in a pine tree (vascular plant) 6. Mitochondria in a Sphagnum moss (land plant) vs. mitochondria of red algaeExplanation / Answer
1. Cell walls in a cyanobacterium vs. cell walls in red algae (Rhodophyta): Homologous structures as these have a common origin.
2. Flagella in the bacterium Escherichia coli vs. flagella in a dinoflagellate aryotic alveolate protist): these are convergent traits, which have evolved independently. Since dinoflagellates flagella have ancestors that have complex apparatus of flagella.
3. Flagella of parasite Giardia lamblia (a diplomonad of the Excavata or Discoba e) vs. flagella of human sperm: - A Analogous
4. oxygenic photosynthesis in a kelp (brown algae) vs. oxvgenic photosynthesis iin ip (a flowering plant): homologous
5. Carbohydrate-conducting trumpet cells in a kelp (brown algae) and carbohydrate lucting phloem tissues in a pine tree (vascular plant): convergent
6. Mitochondria in a Sphagnum moss (land plant) vs. mitochondria of red algae: convergent