Which of the following best describes an example of a specific immune response to pathogens?
a: cytotoxic t cells are activated and destroy cells that pathogens have invaded.
b: fever increases body temperature and speeds up the body's reaction to pathogens.
c: phagocytes identify cells invaded by pathogens and mark them for destruction.
d: mucus traps pathogens and destroys them before they can enter the body.

Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.

Which of th following best describes how genes produce traits in an organism?

Organelles found in plant cells that function through photosynthesis to produce glucose from carbon dioxide and water are called — question 21 options: chloroplasts guard cells photosynthons