Answer:
"polygenic" Can i have brainliest please
Human skin color is a polygenic trait. That means that it is influenced by many genes. It is known few hundreds of genetic loci that are involved in the determination of skin color.
The answer is B. Genetic drift greatly affects small populations, but large populations can recover.
Answer:
Option A, most closely related to mammals
Explanation:
Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.
All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other
Hence, option A is correct
