Why Are Massive Main Sequence Stars Not Likely to Have

question 14

Multiple Choice

Why are massive main sequence stars not likely to have planets that contain life?

• A) The life zones around these stars are too small.
• B) These stars would sweep away all of the material from which planets could form.
• C) These stars are too hot to allow water to exist as a liquid on any planets that might form.
• D) These stars are on the main sequence for too short a time to allow life to evolve.

---

Definitions:

Pharyngeal Tonsils

Lymphoid tissue located in the upper part of the throat behind the nose, known commonly as adenoids.

Lymphatic Trunks

Large lymphatic vessels that collect lymph from smaller lymphatic vessels and deliver it to the venous system.

Subclavian Veins

Major veins located under the clavicle that receive blood from the arm and drain into the superior vena cava.

Collecting Ducts

Channels within the kidneys that receive urine from the nephrons and transport it into the renal pelvis and ureters.