Asked Nov 10, 2019

 Compare the phylogenetic  tree of protists with the secondary endosymbiosis theory which proposes how photosynthetic protists evolved. Are both reconcilable? Explain.


Expert Answer

Step 1

Protists are single celled organisms, but they don’t have much else in common. They are polyphyletic, that means they are evolved from more than one ancestral lineage. It involves evolution of different groups from different genotype, but they exposed to similar natural selection pressure, and achieved similar biological organization. Thus, polyphyletic groups like protists are evolved by parallel evolution or adaptive convergence.

Step 2

Secondary endosymbiosis theory is the phagocytosis of chloroplast bearing eukaryotic cells, that means a living cell engulfs a photosynth...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



Related Biology Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: What is a graded action potential ,when talking about the nervous system, in human anatomy?

A: Graded potentials are changes in membrane potential that vary in size. They include diverse potentia...


Q: State the function of the following structures: nasal mucosa   epiglottis nasal conchae paranasal s...

A: Hello there! Thank you for the question. As you have posted multiple subparts, I will be answering o...


Q: How does the lymphatic system work with the respiratory system to maintain homeostasis and overall b...

A: Homeostasis refers to the maintenance of a constant internal environment with respect to the externa...


Q: What is the mechanism by which R subunits inhibit the C subunits in protein kinase A?

A: Protein kinase A or PKA:PKA is also represented as cAMP-dependent protein kinase. As, it is an enzym...


Q: Climate change due to the increasingly rapid levels of greenhouse gases (particularly CO2) in our at...

A: The stomata are small openings in the leaves that are responsible for exchange of gases like carbon ...


Q: What are the three transport mechanisms of CO2? Which one is the main mechanism?

A: Carbon dioxide is the waste product formed in the reactions of aerobic respiration. When carbon diox...


Q: Recognize the examples given for each of the four categories of neurotransmitter

A: Neurotransmitters are the group of chemical agents that can transmit signals between the nervous sys...


Q: Bio-123 Mitosis Post Lab 7. Complete in the following diagrams that show mitosis ina cell (2n 4). On...

A: Mitosis is the process of equal distribution of chromosomes among daughter cells during cellular div...


Q: Maple syrup urine disease is an autosomal recessive gene.  The R allele leads to a normal protein pr...

A: Maple syrup urine disease is autosomal recessive metabolic disorder that affect branched chain of am...