21. A muscle cell in a human uses a lot of energy for its key function, which is movement. The key function of a certain white blood cell, on the other hand, is to absorb and digest harmful single-celled organisms.
Using your knowledge of cell organelles, explain which specific organelle you would expect to find in a
large abundance in each type of cell. Explain your answer.

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

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.