Why is it that a person with B-type blood does not produce a B-antibody?

What do animals wth echolocation have in common other than echolocation

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.

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?