The correct answer is that "t<span>roponin holds the tropomyosin in place on the actin".
In excitation-contraction coupling, tropomyosin prevents the interaction between actin and myosin in resting muscles. In the event of excitation, there is release of calcium from the sarcoplasmic reticulum wherein the troponin will bind this calcium and will release tropomyosin and expose myosin enabling it to attach to actin and therefore facilitating muscle contraction.</span>
So, in the food web, plants and arthropods go straight to birds. Meaning, the bird eats both plants and animals.
An omnivore will eat both plants and animals, so the bird would be classified as D, an omnivore.
Lipids
Lipids are fatty acids
Independent variable i think
Answer:
its obviously b or c but im almost positive c....
