Question

1. what are the differences between prokaryotes and eukaryotes? select all that apply.

dna
plasma membrane
nucleus
ribosomes
organelles

1. during the nineteenth century, many scientists and naturalists studied microscopic organisms under the microscope. after studying plant tissues, animal tissues, protozoans under the microscope, scientists summarized their observations of cells and formulated the cell theory. which would not be included as part of the cell theory?

unicellular organisms can grow from organic molecules.
cells are the building blocks of living structures.
parent cells pass genetic material on to daughter cells.
all living things are made of one or more cells.

1. all living organisms are composed of one or more ________.

1. fill in the blanks using the available answer choices.

cells arise only from previously ______ with cells passing ______ on to their daughter cells.

(blank 1)
blank 1 options

• dead cells
• alive cells
• existing cells
• divided cells

(blank 2)
blank 2 options

• genetic material
• proteins

Explanation:

1. Answer:

• DNA, plasma membrane.
• Brief Explanations:
• Prokaryotes have a cell membrane (plasma membrane) and DNA. Eukaryotes also have a plasma membrane and DNA. Ribosomes are present in both (but the question is about differences). Nucleus is a eukaryotic feature (prokaryotes have a nucleoid region). Organelles (like mitochondria, endoplasmic reticulum etc.) are mainly eukaryotic (prokaryotes have simpler structures).

1. Answer:

• Unicellular organisms can grow from organic molecules.
• Brief Explanations:
• The cell theory states that all living things are made of cells (so “All living things are made of one or more cells” is part of the cell theory). Cells are the building blocks of living structures (so “Cells are the building blocks of living structures” is part of the cell theory). Parent cells pass genetic material to daughter cells (cell division aspect of cell theory). But the idea that unicellular organisms can grow from organic molecules is not part of the cell theory. The cell theory emphasizes that cells come from pre - existing cells.

1. Answer:

• Cells.
• Brief Explanations:
• The cell theory's first tenet is that all living organisms are composed of one or more cells.

1. Answer:

• Blank 1: alive cells; Blank 2: genetic material.
• Brief Explanations:
• The cell theory's third tenet is that cells arise only from previously alive cells (through cell division). And during cell division, parent cells pass genetic material to daughter cells.

Answer:

1. Answer:

• DNA, plasma membrane.
• Brief Explanations:
• Prokaryotes have a cell membrane (plasma membrane) and DNA. Eukaryotes also have a plasma membrane and DNA. Ribosomes are present in both (but the question is about differences). Nucleus is a eukaryotic feature (prokaryotes have a nucleoid region). Organelles (like mitochondria, endoplasmic reticulum etc.) are mainly eukaryotic (prokaryotes have simpler structures).

1. Answer:

• Unicellular organisms can grow from organic molecules.
• Brief Explanations:
• The cell theory states that all living things are made of cells (so “All living things are made of one or more cells” is part of the cell theory). Cells are the building blocks of living structures (so “Cells are the building blocks of living structures” is part of the cell theory). Parent cells pass genetic material to daughter cells (cell division aspect of cell theory). But the idea that unicellular organisms can grow from organic molecules is not part of the cell theory. The cell theory emphasizes that cells come from pre - existing cells.

1. Answer:

• Cells.
• Brief Explanations:
• The cell theory's first tenet is that all living organisms are composed of one or more cells.

1. Answer:

• Blank 1: alive cells; Blank 2: genetic material.
• Brief Explanations:
• The cell theory's third tenet is that cells arise only from previously alive cells (through cell division). And during cell division, parent cells pass genetic material to daughter cells.