Unlike exocrine glands, endocrine glands

a. release secretions outside the body

b. release digestive enzymes.

c. releases secretions directly into the blood

d. usually have ducts

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.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

What are the student's observations and inferences before he starts his investigation?