Answer:
A = Rr, TT
Explanation:
Rr means it is a heterozygous dominant, TT means it is a different, dominant.
Answer:
Spider has a circulatory system
Hey there!!
The answer to your question:
The niche of an organism is the functional role that it plays within an ecosystem.
Answer is B) 1, 3, 2
Fish with craniums naturally preceded the evolution of sharks, since sharks have craniums. Sharks must have evolved from a cranium-wielding ancestor.
Sharks evolved about 450 million years ago, before land vertebrates (animals with spines and skeletal systems) even existed. Mammals evolved about 100 million years later.