Charles Darwin made the observations which led to the theory of evolution.
Answer:
3.
Explanation:
there are three things that make up any nucleus:
Protons
Neutrons
Electrons
The amount of each will very by what type of atom it is, but the things that make up a nucleus do not change when in the body.
Answer:
Such glands are classified as endocrine glands.
Explanation:
Endocrine glands also known as ductless glands produce and secretes hormones (chemical substances) directly into the bloodstream to regulate the activities of cells or organs. The endocrine glands make-up the endocrine system. This system influence reproduction, metabolism, growth and many other body functions. The endocrine glands include the hypothalamus, the pituitary, thyroid, ovaries, testes, pineal gland, parathyroids, pancreas and adrenal glands.
In contrast to the endocrine glands is the exocrine glands. The exocrine glands produce and secretes their hormones through ductal system onto epithelial surface. Example of exocrine glands are sebaceous glands of the skin, the pyloric and Cardia glands of the stomach, salivary glands etc.
