Question

what modern example of endosymbiosis was mentioned in the video?
algae living inside coral
bacteria living in human intestines
bacteria living on plant roots
prokaryotes living in termite guts helping digest wood
question 8 10 pts
which organelle is believed to have evolved first in eukaryotic cells?
cell wall
nucleus
mitochondria
chloroplasts

Explanation:

First Question (Endosymbiosis Example)

Endosymbiosis is a symbiotic relationship where one organism lives inside another. Prokaryotes (like certain bacteria) in termite guts helping digest wood is a classic modern example of endosymbiosis, as the prokaryotes and termites have a mutualistic internal symbiosis. Algae in coral is symbiosis but not the typical endosymbiosis example related to the evolution of organelles (the context of endosymbiosis theory for eukaryotes). Bacteria in human intestines are commensal or mutualistic but not the key example for endosymbiosis in the context of eukaryotic evolution. Bacteria on plant roots are a rhizosphere relationship, not endosymbiosis.

According to endosymbiosis theory and eukaryotic evolution, mitochondria are believed to have evolved first. The nucleus is a defining eukaryotic feature but likely evolved after mitochondria. Chloroplasts evolved later (from cyanobacteria - like organisms, after mitochondria, in plant - like lineages). The cell wall is not an organelle and has different evolutionary origins across organisms.

Answer:

D. Prokaryotes living in termite guts helping digest wood

Second Question (First Eukaryotic Organelle)