Alarge population of houseflies was sprayed with a newly developed, fast-acting insecticide. the appearance of some houseflies that are resistant to this insecticide supports the concept that

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?