Which of the following regarding glands is correctly matched? Group of answer choices Exocrine and endocrine glands are categorized by the presence or absence of ducts. Exocrine and endocrine glands are categorized by the type of tissue they are made from. Exocrine and endocrine glands are two terms for the same thing. Humans have endocrine glands but non-human animals have exocrine glands. All of these are true.