The Following Question Refers to This Phylogenetic Tree, Depicting the Origins

question 4

Multiple Choice

The following question refers to this phylogenetic tree, depicting the origins of life and the three domains. Horizontal lines indicate instances of gene or genome transfer. A possible phylogenetic tree for the three domains of life.
-If the early history of life on Earth is accurately depicted by the figure, then which statement is most in agreement with the hypothesis proposed by this tree?

• A) The last universal common ancestor of all extant species is one individual species.
• B) The origin of the three domains appears as a polytomy.
• C) Archaean genomes should not contain genes that originated in bacteria, and vice versa.
• D) Eukaryotes are more closely related to archaeans than to bacteria.

---

Definitions:

Parkinson's Disease

A progressive nervous system disorder that affects movement, causing symptoms like tremors, stiffness, and slowing of movement.

Brain Cells

Cells that constitute the brain, including neurons, which are responsible for transmitting signals, and glial cells, which provide support and protection for neurons.

Parkinson's Disease

A neurodegenerative disorder that affects movement, often including tremors, stiffness, and difficulty with balance and coordination.

Dementia

A broad category of brain diseases that cause a long-term and often gradual decrease in the ability to think and remember.