Question

quiz: organisms: cells to body systems
read each question. circle the letter of the correct answer.

1. which of these shows the largest of hierarchical structural organization?

a. bacteria
b. unicellular life
c. multicellular life

1. the structure of a human skin cell differs from that of a human muscle cell. the two cells most likely have different

a. genes
b. functions
c. life processes

1. what is the function of epithelial tissue in the human stomach?

a. support and bind other tissues together
b. contract to allow for movement of the stomach
c. provide protection and allow secretion and absorption

1. what are the main differences between plant and animal cells?

a. animal cells are eukaryotes and plant cells are not.
b. plant cells have cell walls and chloroplasts; animal cells do not.
c. animal cells have cell walls and chloroplasts; plant cells do not.

1. which of these organelles can be found in the cytoplasm and on the surface of the endoplasmic reticulum?

a. ribosomes
b. nucleus
c. mitochondria

1. specialized structures that work together inside a cell are called

a. nuclei
b. organelles
c. eukaryotes

1. which of these best explains the difference between eukaryotes and prokaryotes?

a. eukaryotes have simpler cells and can only be unicellular.
b. eukaryotes have simpler cells and can be either unicellular or multicellular.
c. eukaryotes have more complex cells and can be either unicellular or multicellular.

1. a membrane - bound sac used to transport substances into and out of cells is a

a. nucleus
b. vacuole
c. endoplasmic reticulum

Explanation:

1. Multicellular life represents a higher - level of hierarchical structural organization compared to bacteria (which can be unicellular) and unicellular life in general.
2. Different cell types in the body, like skin and muscle cells, have different functions due to cell - specialization, even though they have the same genes and are involved in similar life processes at a basic level.
3. Epithelial tissue in the human stomach provides protection and allows for secretion and absorption. Connective tissue supports and binds other tissues, and muscle tissue contracts for movement.
4. Plant cells have cell walls for structure and chloroplasts for photosynthesis, which animal cells lack. Both plant and animal cells are eukaryotes.
5. Ribosomes can be found in the cytoplasm and on the surface of the endoplasmic reticulum. The nucleus is a separate organelle, and mitochondria are mainly involved in energy production.
6. Organelles are specialized structures that work together inside a cell. Nuclei are a type of organelle, and eukaryotes are a type of cell, not specialized structures within a cell.
7. Eukaryotes have more complex cells with a nucleus and membrane - bound organelles and can be either unicellular or multicellular, while prokaryotes are simpler and usually unicellular.
8. A vacuole is a membrane - bound sac used for transporting substances into and out of cells. The nucleus contains genetic material, and the endoplasmic reticulum is involved in protein and lipid synthesis.

Answer:

1. C. multicellular life
2. B. functions
3. C. provide protection and allow secretion and absorption
4. B. Plant cells have cell walls and chloroplasts; animal cells do not.
5. A. ribosomes
6. B. organelles
7. C. Eukaryotes have more complex cells and can be either unicellular or multicellular.
8. B. vacuole