Question
▶️Answer/Explanation
Answer: D
Explanation:
In biology, classification is based on the evolutionary relationships among organisms. The genus is a category that groups together species that are closely related. All species within a genus share a common evolutionary ancestor, meaning they have evolved from the same lineage.
Question
What is a recognition feature for both of the plant phyla indicated?
▶️Answer/Explanation
Answer: D
Question
Which encircled area shows a clade?
▶️Answer/Explanation
Answer: C
Explanation: A clade is a group of organisms that includes:
- a common ancestor
- and ALL of its descendants
This is also called a monophyletic group in phylogenetics.
Let’s check each option:
Option A: Includes a common ancestor BUT not all its descendants. – NOT a clade
Option B: Looks like it’s picking only 2 tiny tips but doesn’t go back to the common ancestor that gave rise to all members of the group. – Not a clade either
Option C: Encloses a node (common ancestor) and includes all descendants of that node – Perfect clade definition
Option D: Odd shape… looks like it’s grouping species from different branches. Doesn’t trace back to a single common ancestor with all descendants – Not a clade