6.12d

Which error (s) did Ernest make?

• Ernesto stated that the smallest possible living thing is made of one cell. This is not true. Atoms are living things, and they are smaller than a cell.

• Ernesto stated that Everything on Earth, including water and air, is made of cells. This is not true. Only living things are made of cells, not nonliving things like water or air.

• Ernesto stated that new cells cannot be made in a science lab from other materials. This not true. A scientist can made a new cell if he or she has the right materials such as proteins, water, DNA and lipids.

• Ernesto stated that all living things are made of cells. This not true. Some organisms, such as fish and worms, are not made of cells.

Tags

NGSS.MS-LS1-1

What are the differences between a prokaryotic and eukaryote?

• The prokaryote does not have a membrane bound nucleus, but the eukaryote does

• The prokaryote has more cell structures than the eukaryote

• the prokaryote is larger

• the eukaryote has several cells

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NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which of the following functions can a unicellular organism perform?

• eat

• eliminate waste

• reproduce

• all of the above

What is the main difference between a prokaryotic cell and an eukaryotic cell?

• Only prokaryotic cells have vauoles

• Eukaryotic cells are smaller than prokaryotic cells

• Prokaryotic cells have many organelles, each with their own specialized functions.

• Only eukaryotic cells have its genetic material surrounded by a membrane.

A biology student planned an investigation to observe some of his own cells. He used a swab to get cells form the inside surface of his cheek. He put the cells n a slide and dyed them with a drop of dye. Then he put the slide under a microscope. The student observed that his cheek cells were all similar in size and shape. Next, he scraped some skin cells from his own arm. he put the cells on a slide and dyed them. The student noticed that the skin cells were a different shape than the cheek cells. He concluded that cells form different parts of his body probably had different shapes, depending on their function.

How do the biology student's observations relate to cell theory?

• The biology student saw the different cells had different shapes. This does NOT support cell theory, which states that all cells are identical.

• the biology student saw that his body was made of cells. this supports cell theory, which states that all living things are made of cells.

• The biology student saw that cheek cells were alive, but skin cells were dead. This supports cell theory, which states that nonliving things such as air or water are me of nonliving cells, while living things such as plants and animals are made of living cells.

• The biology student's observations do not relate to cell theory in any way.

Tags

NGSS.MS-LS1-1

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Tom learned about cell theory in science class. He recorded four ideas about cell theory in his science notebook. One of Tom's ideas is incorrect. Which of Tom's statements is INCORRECT, according to cell theory?

• Cell theory tells what cells are, why they are important, and where they come from.

• According to cell theory, humans, cats, flowers, and ants are all made of cells.

• Cells are made of protein, lipids, nucleic acids, and water. if you mix these substances together in a beaker, cells will results.

• Cells are the smallest possible living things. If it is smaller than a cell, it cannot be alive.

Tags

NGSS.MS-LS1-1

The amoeba is a microorganism composed of just one cell. While the pear tree is composed of about 15 trillion cells. Which statement is NOT true, according to cell theory?

• Like an amoeba and a pear tree, all organisms are composed of one or more cells.

• The cells are both in amoeba and a pear tree carry on similar functions such as obtaining energy from food, producing waste and reproducing.

• Cell theory refers only to organisms made of just one cell, like an amoeba.

• The cells in both an amoeba and a pear tree have similar parts such as cell membranes and nuclei

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Each student in the study group wrote an explanation of cell theory using their own words. Which explanation of cell theory is NOT correct?

• Cell theory states that all organisms are made of one or more cells.

• According to cell theory; everything on Earth both living and nonliving is made of cells.

• Cell theory stats that all cells come from other cells.

• According to cell theory; cells are the basic unit of life, and carry out functions such as obtaining energy from food and producing waste.

Cell theory was developed int he 1800s by the scientist Matthias Schwann and Theodor Schleiden, and by Rudolf Virchow, a doctor. The theory was based on their own careful observations of cells, as well as on observations from other scientist. Which statements about cell theory is NOT correct.

• Cell theory states that cells are nonliving things.

• Cell theory states that all organisms are made of cells.

• Cell theory states that the cell is the smallest unit of life.

• Cell theory states that new cells come from preexistign cells.

• F

• G

• H

• J