A skeletal muscle is a composition of several components bundled one into the other. At which structural level in the muscle does contraction
occur to bring about contraction in the whole muscle?
OA myofibril
B. muscle fiber
OC. myoneural junction
D. tendon
E. fascicle

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

What is the difference between how ionic and covalent bonds form