One hypothesis suggests that the cambrian explosion was caused by the rise of predator-prey relationships. This hypothesis is best supported by an increased incidence of which fossil traces?

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream

What is the compliment dna strand to the following sequence: ttgactaggcta

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?