The sarcolemma is (the) endoplasmic reticulum of skeletal muscle fibers. cytoplasm of skeletal muscle fibers. cell membrane of skeletal muscle fibers. extension of the skeletal muscle cell membrane into the cell. none of the above.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion