Plz

question 1
why does mitosis need to occur?

a) it is where all organisms reproduce and repair tissues by creating new cells with half of the dna that was found in the parent cell.

b) it is where multi-celled organisms reproduce by creating new cells with twice the dna that was found in the parent cell.

c) it allows single-celled organisms to reproduce, and other organisms to repair damaged tissues and grow.

d) it allows single-celled organisms to reproduce and for other organisms to obtain the extra chromosomes needed for growth.

question 3
which of the following happens during cell division?

a) it becomes more difficult for the cell to get rid of wastes.
b) it becomes more difficult for the cell to get enough oxygen and nutrients.
c) the cell's volume increases.
d) each daughter cell receives its own copy of the parent cell's dna.

question 4
cells of unicellular organisms are

a) specialized to perform different tasks.
b) unable to respond to changes in the environment.
c) able to carry out all of the functions necessary for life.
d) larger than cells in multicellular organisms.

question 5
during diffusion, when the concentration of molecules on both sides of the membrane is the same, the molecules will

a) stop moving across the membrane.
b) continue to move across the membrane in both directions.
c) move across the membrane to the inside of the cell.
d) move across the membrane to the outside of the cell.

question 6
after normal division during mitosis, how many chromosomes does each daughter cell contain compared to the parent cell?

a) twice as many
b) half as many
c) four times as many
d) the same number

question 7
what conclusion could you draw about the cell pictured? (picture from biologywise. com)

a) the cell is prokaryotic be cause it has a nucleus.
b) the cell is prokaryotic because it does not has a nucleus.
c) the cell is eukaryotic because it has a nucleus.
d) the cell is eukaryotic because it does not has a nucleus.

question 8
when water is diffused across a selectively permeable membrane, scientists refer to that as

a) active transport
b) osmosis
c) cellular respiration
d) diffusion

question 9
the job of the organelle circled is (there are several in the cell) ( picture from purposegames. com)

a) to be the brain of the cell and give instructions to every part of the cell.
b) to convert substances into usable energy.
c) to separate the inside of the cell from the outside of the cell.
d) digest and remove and the waste inside the cell.

question 10
which statement best describes the relationship between the cytoplasm and the nucleus?

a) the nucleus is a jelly-like fluid, and it mixes with the cytoplasm, that is a fluid much like the nucleus.
b) the cytoplasm is a jelly-like fluid that fills the nucleus.
c)the cytoplasm is an organelle that is usually found next to the nucleus.
d) the nucleus is an organelle that is surrounded by the cytoplasm, a jelly-like fluid.

question 11
which choice best describes the main function of chloroplasts?

a) to package complex sugars and send them to vesicles
b) to convert light energy to chemical energy
c) to convert energy from chemical bonds in glucose to atp
d) to circulate nutrients through the cell

question 12
what is the purpose of cellular respiration?

a) remove carbon dioxide
b) produce glucose
c) produce usable energy - atp
d) make oxygen

question 13
we know that not all cells are alike. which is not a true statement about the difference between cells?

a) different cells are different sizes.
b) cells come in a lot of different shapes.
c) most cells have a membrane, though some don't.
d) some cells have a nucleus, though some don't.

question 14
this organelle functions much like a recycling center.

a)lysosome
b) cell wall
c) nucleus
d) mitochondria

question 15
a scientist in a lab looks under a microscope at muscle tissue and makes a few observations on what he notices. looking at the scientist’s observations below, which one best supports cell theory?

a) the muscle tissue cells contain multiple mitochondria.
b) each cell contains more than one nucleus
c) the cells in the muscle tissue are undergoing mitosis.
d) none of the above

question 16
while observing a cell under your microscope, you determine that it is a prokaryote. what about that cell made you think that?

a) the cell lacks dna.
b) the cell lacks a cell membrane.
c) the cell lacks a nucleus.
d) the cell lacks cytoplasm.

question 17
which organelles are involved in energy conversion?

a) mitochondria and lysosomes
b) cytoplasm and chloroplasts
c) lysosomes and chloroplasts
d) mitochondria and chloroplasts