12. what becomes a problem as a single cell grows larger?

it is harder for the cell to move around due to the extra volume and mass.

the surface area-to-volume ratio makes it harder for the cell to get food and remove waste.

cell replication takes longer because there is more cell to copy.

communication among the cell parts becomes less efficient because they are farther apart.

13.a(n) will bind to the of an enzyme so the chemical reaction can occur.

product; reactant

substrate; product

enzyme; substrate

substrate; active site

14. read the scenario.

carrie made a gelatin fruit salad for her class picnic. she mixed orange gelatin and a can of fruit together and placed the mixture in the refrigerator overnight. when she pulled the mixture out in the morning, the gelatin had solidified with the fruit suspended in it.

which cell organelle is best represented by the gelatin?

the vacuole

the endoplasmic reticulum

the cytoplasm

the nucleolus

15. the following shows the order of organization in multicellular organisms.

cell, organ, tissue, organ system

explain why the order is incorrect.

organ comes after organ system.

tissue comes before the organ.

cell is the last level of organization.

organ system is the first level of organization.

16. identify the two basic types of cells.

spirillium and prokaryotic
prokaryotic and eukaryotic
eukaryotic and bacilli
prokaryotic and coccus

17.mrs. hines is grading her students' biology exams. question 3 asks students to circle the answers that classify a cell as a prokaryote. one student's exam has the following answers circled:

has genetic material found within a nucleus
has cytoplasm
has a cell membrane

why should mrs. hines mark the student's answer incorrect?

the student's answers are correct, and mrs. hines made a mistake.
only eukaryotes have cytoplasm.
prokaryotes do not have a nucleus.
prokaryotes do not have a cell membrane.

18the smallest unit that can carry out all activities necessary for life is the

element

nucleus

atom

cell

19. which part of the microscope supports a side that contains the viewed specimen?

the low-power objective

the base

the eye piece

the stage

20. why is the cell membrane described as being selectively permeable?

it allows anything to enter and exit the cell.

it allows nothing to enter or exit the cell.

it allows needed materials to enter the cell and wastes to leave the cell.

it allows only water to enter the cell.

21. what are the three basic features all cells share?

cell wall, cell membrane, and cytoplasm

genetic material (dna), flagella, and a nucleus

cell membrane, cytoplasm, and genetic material (dna)

cytoplasm, cell membrane, and chloroplasts

22, read the scenario.

charles has prepared a slide of onion skin cells. he wants to observe as much detail of individual cells as possible.

which microscope part would charles see the most detail of the onion cell?

the stage clip

the low-power objective

the high-power objective

the mirror

23. which of the following pairs of terms is related?

(select all that apply.)

nucleus – control
cell wall – protect
vacuoles – transport
mitochondria – decompose