Which organelle is labeled h?
a) cell membrane
b) cell wall
c) endoplasmic reticulum
d) nucleus

The correct answer is A) cell membrane.

Cell membrane or plasma membrane is the outer living boundary of animal cells. It is a dynamic structure and is a semi-permeable or selectively membrane. It is made of lipoprotein (lipid and protein). The plasma membrane is a mosaic of phospholipids, cholesterol and proteins. The proteins in the plasma membrane regulates the coming and going of substances into and out of the cell.  

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands