Which of the following statements are true of the cell membrane? I. composed of proteins and lipids
II. composed of proteins and cellulose
III. located in animal cells
IV. located in plant cells
V. semipermeable
VI. not permeable at all
A.
I, III, IV, and V only
B.
II, III, IV, and VI only
C.
I, IV, and VI only
D.
II, IV, and V only

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

Describe five factors that influence the value of fuel