To activate means to start, and activation energy starts the reaction, which means activators start the reaction.
Answer: Activators
<span>Polygenic traits have more than one gene that controls the overall trait. Hope this helps!</span>
<span>The Cambrian. The Cambrian Explosion, which began roughly 545 million years ago, was a relatively rapid (~5-10 million years) diversification of multicellular life, including most of the animal phyla currently extant today. This was an evolutionary arms race of sorts, with many creatures achieving both larger size as well as symmetrical bodies and various structural supports, including skeletal systems. It was also a highly experimental times in terms of evolution, as many forms of creatures arose and went extinct in rapid succession during this period.</span>
Answer:
Otter
Explanation:
Otters depend on yellow perches, if the amount of yellow perches decrease so will its predators.
Trait
I'm sorry I don't know how to explain it.