Hormones are chemical messengers that travel to target cells through the circulatory system. B) Hormones often regulate homeostasis through antagonistic functions. C) Hormones of the same chemical class usually have the same function. D) Hormones are secreted by specialized cells usually located in endocrine glands. E) Hormones are often regulated through feedback loops.

/the trachea, commonly known as the windpipe

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

there is not 1 highest source of protein, but there are many; meats, fish, poultry, seafood, cheese, eggs, yogurt and milk. the only non complete animal food that is beneficial is gelatin.

sorry if this did not , have a great day!