Asked by Christopher Valleau on May 01, 2024
Verified
What is the correct evolutionary pathway for the key features of chordates?
A) notochord-vertebrae-jaws-bony skeleton-lungs-4 limbs-amniotic egg-mammary glands
B) vertebrae-notochord-jaws-bony skeleton-lungs-4 limbs-amniotic egg-mammary glands
C) notochord-vertebrae-jaws-bony skeleton-lungs-amniotic egg-4 limbs-mammary glands
D) notochord-vertebrae-jaws-bony skeleton-mammary glands-lungs-4 limbs-amniotic egg
E) mammary glands-notochord-vertebrae-jaws-lungs-4 limbs-amniotic egg-bony skeleton
Evolutionary Pathway
A sequence of genetic, structural, or functional changes that occur in a biological lineage over time leading to diversification and speciation.
Notochord
A flexible rod-like structure that provides support in all embryonic and some adult chordate animals.
Amniotic Egg
An egg with a protective amniotic membrane, enabling the embryo to develop outside the mother's body, characteristic of reptiles, birds, and certain mammals.
- Summarize critical milestones and traits in the development of chordates over evolutionary time.
Verified Answer
AK
ambica kothakapuMay 07, 2024
Final Answer :
A
Explanation :
The correct evolutionary pathway for chordates starts with the development of a notochord, followed by the evolution of vertebrae, jaws, a bony skeleton, lungs, four limbs, the amniotic egg, and finally mammary glands. This sequence reflects the major evolutionary milestones from early chordates to mammals.
Learning Objectives
- Summarize critical milestones and traits in the development of chordates over evolutionary time.