What Is a Planetary Nebula

question 74

Multiple Choice

What is a planetary nebula?

• A) Gas ejected from a low-mass star in the final stage of its life
• B) Gas created from the remains of planets that once orbited a dead star
• C) Interstellar gas from which planets are likely to form in the not-too-distant future
• D) The remains of a high-mass star that has exploded

---

Definitions:

Phylogeny

Phylogeny is a visual representation of the evolutionary history of populations, genes, or species.

Homology

Homology refers to the similarity of characteristics resulting from shared ancestry.

Bat Wings

A term describing the wing structure of bats, which consists of a membrane stretched between elongated fingers.

Fly Legs

Fly legs are the limbs of flies, typically utilized for landing, walking, tasting, and manipulating objects, showcasing a variety of specialized adaptations.