Which one of the following proteins is a large actin-binding protein located just inside the sarcolemma of skeletal muscle fibers, and is involved in the functional organization of myofibrils: Troponon b. Dystrophin c. Tropomyosin d. a-actinin e. Titin

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.