In Snake Populations,rare Individuals Are Found That Have Well-Developed Hind

question 18

Multiple Choice

In snake populations,rare individuals are found that have well-developed hind limbs.They are normal in all other respects.This finding shows that

• A)some snakes have mutations in Hox genes that permit development of limbs.
• B)snakes retain the genes for hindlimb pattern formation,even though the genes are usually not activated during development.
• C)some snakes may lack the regulatory inhibitors necessary for normal limbless development.
• D)all of the above might explain this rare condition.

---

Definitions:

Secondary

Pertaining to the second level or stage in a sequence or process.

Sex Characteristics

The traits that distinguish the biological sexes of male and female, including primary characteristics like reproductive organs and secondary characteristics like body hair distribution.

Menstrual Period

The monthly discharge of blood and mucosal tissue from the inner lining of the uterus through the vagina.

Circadian Rhythm

The internal biological clock that regulates the sleep-wake cycle, repeating roughly every 24 hours, influencing various physiological processes.