Answer:
Between one-third and one-half of all fertilized eggs never fully implant. A pregnancy is considered to be established only after implantation is complete
Answer:
D
Explanation:
Mechanism of macroevolution works by multiple acts of speciation on an ancestral organism.
Answer:
1. Isle Royale is closed system and Yellowstone is open system
2. Yellowstone has more diverse species than isle Royale
3. Isle Royale is in Michigan and Yellowstone is in Wyoming