practice
answer the following questions on cells and cell theory. darken the circle or circles that correspond to your answer choice(s).
1. which of the following forms all matter?
a proteins b atoms c cells d dna
2. what is the main distinguishing factor between matter being considered living or nonliving?
a the presence of elements b the presence of atoms c the presence of organic compounds d the presence of cells
3. identify the three parts of cell theory.
a all cells are made up of various chemical compounds including proteins, carbohydrates, and lipids.
b the cell is the basic unit of structure and function in all living organisms.
c living organisms are made up of one or more cells.
d all matter is composed of chemical elements and compounds.
e cells come from the reproduction of preexisting cells.
f cells may form spontaneously from inorganic compounds.
4. which two of the following scientists are most responsible for determining that all living things are made up of one or more cells?
a robert hooke b anton van leeuwenhoek c francesco redi d matthias schleiden e theodor schwann f rudolf virchow
5. which scientist was most responsible for establishing the idea that all cells come from the reproduction of other cells?
a robert hooke b matthias schleiden c theodor schwann d rudolf virchow
6. a scientist studies an object under a microscope. after careful study, the scientist concludes that the object does not represent a living organism. which of the following would best justify the scientist’s conclusion?
a the object cannot move on its own.
b the object shows no signs of reproduction.
c the object contains no evidence of cells.
d the object does not appear to be growing or developing.

Question

practice
answer the following questions on cells and cell theory. darken the circle or circles that correspond to your answer choice(s).
1. which of the following forms all matter?
   a proteins  b atoms  c cells  d dna
2. what is the main distinguishing factor between matter being considered living or nonliving?
   a the presence of elements  b the presence of atoms  c the presence of organic compounds  d the presence of cells
3. identify the three parts of cell theory.
   a all cells are made up of various chemical compounds including proteins, carbohydrates, and lipids.
   b the cell is the basic unit of structure and function in all living organisms.
   c living organisms are made up of one or more cells.
   d all matter is composed of chemical elements and compounds.
   e cells come from the reproduction of preexisting cells.
   f cells may form spontaneously from inorganic compounds.
4. which two of the following scientists are most responsible for determining that all living things are made up of one or more cells?
   a robert hooke  b anton van leeuwenhoek  c francesco redi  d matthias schleiden  e theodor schwann  f rudolf virchow
5. which scientist was most responsible for establishing the idea that all cells come from the reproduction of other cells?
   a robert hooke  b matthias schleiden  c theodor schwann  d rudolf virchow
6. a scientist studies an object under a microscope. after careful study, the scientist concludes that the object does not represent a living organism. which of the following would best justify the scientist’s conclusion?
   a the object cannot move on its own.
   b the object shows no signs of reproduction.
   c the object contains no evidence of cells.
   d the object does not appear to be growing or developing.

Accepted Answer

### Question 1
# Brief Explanations:
Matter is made up of atoms. Proteins are biological molecules, cells are the basic units of life, and DNA is a genetic material—none of these form all matter. Atoms are the fundamental building blocks of matter.
# Answer:
B. atoms

### Question 2
# Brief Explanations:
The cell theory states that all living things are made of cells. Elements and atoms are in all matter (living and non - living), and organic compounds can be in non - living matter too. The presence of cells is the key to distinguishing living from non - living matter.
# Answer:
D. the presence of cells

### Question 3
# Brief Explanations:
The three parts of cell theory are: 1. The cell is the basic unit of structure and function in all living organisms (Option B). 2. Living organisms are made up of one or more cells (Option C). 3. Cells come from the reproduction of preexisting cells (Option E). Option A is about cell composition, D is about matter composition, and F is incorrect as cells don't form spontaneously from inorganic compounds.
# Answer:
B. The cell is the basic unit of structure and function in all living organisms, C. Living organisms are made up of one or more cells, E. Cells come from the reproduction of preexisting cells

### Question 4
# Brief Explanations:
Matthias Schleiden (studied plant cells) and Theodor Schwann (studied animal cells) were instrumental in determining that all living things are made of one or more cells. Robert Hooke discovered cells, Anton van Leeuwenhoek discovered microorganisms, Francesco Redi disproved spontaneous generation, and Rudolf Virchow contributed to the idea that cells come from pre - existing cells.
# Answer:
D. Matthias Schleiden, E. Theodor Schwann

### Question 5
# Brief Explanations:
Rudolf Virchow is most responsible for establishing that all cells come from the reproduction of other cells. Robert Hooke discovered cells, Matthias Schleiden studied plant cells, and Theodor Schwann studied animal cells.
# Answer:
D. Rudolf Virchow

### Question 6
# Brief Explanations:
According to cell theory, all living organisms are made of cells. So if an object has no evidence of cells, it is likely non - living. Movement, reproduction, and growth can be misleading (e.g., some non - living things can move, and some living things have limited growth or reproduction in certain stages), but the presence of cells is a fundamental characteristic of life.
# Answer:
C. The object contains no evidence of cells

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