Question

In the diagram below, "A" is _____.; "B" is ________.

1) the most recent species to evolve on Earth; an ancestor of group "A"
2) the most recent species to evolve on Earth; the last common ancestor of Archaea and Eukarya
3) the common ancestor of all life; the common ancestor of Bacteria and Archaea
4) the common ancestor of all life; the last common ancestor of Archaea and Eukarya

Answer 1

In the diagram below, "A" is the common ancestor of all life; "B" is the last common ancestor of Archaea and Eukarya.

The answer is option ⇒1) the common ancestor of all life; the last common ancestor of Archaea and Eukarya

Step-by-step explanation:

To understand the meaning of this diagram, let's break it down step by step:

1. Common Ancestor of All Life (A):

• - "A" represents the earliest known ancestor from which all life on Earth is believed to have descended.
• - This common ancestor is thought to have existed billions of years ago.
• - It is important to note that "A" is a hypothetical representation and not a specific individual or organism.

2. Last Common Ancestor of Archaea and Eukarya (B):

• - "B" represents the most recent ancestor shared by Archaea and Eukarya, two domains of life.
• - Archaea and Eukarya are two of the three domains of life, with the third being Bacteria.
• - "B" is the point where the branches representing Archaea and Eukarya diverge from the common ancestor "A".
• - After this divergence, Archaea and Eukarya evolved independently, resulting in their distinct characteristics and features.

It's important to understand that the diagram provides a simplified representation of the complex evolutionary relationships between different domains of life. It shows the concept of a common ancestor and the divergence of different lineages over time.

The answer is option ⇒1) the common ancestor of all life; the last common ancestor of Archaea and Eukarya