1. multicellular = containing many cells = humans
unicellular = containing single cell = bacteria
2. The absence of a cell wall in animal cells means that they are more fragile and easily
damaged. The fluid nature of the cytoplasm in animal cells makes it difficult to see
the internal structures of the cell without staining them.
3. ribosomes, nucleus, chloroplast, cell wall, vacuole, cell membrane
4. ribosomes, nucleus, cell membrane
5. no
6. 1000 micrometers = 1 mm
7. no
1.
2.
3.
4.
5.
B
C
B
B
a. i. shows cell walls; more rectangular
ii. has nucleus
iii. chloroplast
b. i. contains genetic material (chromosomes which are made of DNA) to determine
kind of protein made in the cell
ii. for protein synthesis
6. a. no
b. cytoplasm = a jelly-like substance where metabolic reactions occur
cell membrane = a partially permeable membrane that controls what goes in and out
of the cell
nucleus = contains DNA to determine kind of protein made in cell
c. to conduct electrical impulses
7. a. nucleus
b. B = mitochondria, to provide energy from glucose so they can make protein
molecules
C = cytoplasm, for metabolic reactions, also has proteins dissolved in it