Cell Theory

Question 1

Which cell structures are seen in all cell types? Check all that apply.

Revolt · Accepted Answer

DNA; cytoplasm; ribosomes; cell membrane

Question 2

Organisms that contain only one cell and do not contain a nucleus or membrane-bound organelles are known as .

Revolt · Accepted Answer

prokaryotes

Question 3

Which descriptions apply to prokaryotic cells? Check all that apply.

Revolt · Accepted Answer

are usually single-celled; do not contain membrane-bound organelles; have DNA located in cytoplasm

Question 4

An interaction between two organisms in which one usually benefits is known as .

Revolt · Accepted Answer

symbiosis

Question 5

Which term describes the relationship in which one organism lives inside the other one. Check the correct answer.

Revolt · Accepted Answer

endosymbiosis

Question 6

Complete the statement below using the drop-down menus.It is believed mitochondria evolved from ,while chloroplasts evolved from .

Revolt · Accepted Answer

cyanobacteria; aerobic bacteria

Question 7

How is mitochondrial DNA used in science? Choose the correct answer.

Revolt · Accepted Answer

mtDNA is used to connect DNA samples to the mother in missing-person cases.

Question 8

Is it possible today for a plant leaf cell to live without mitochondria and chloroplasts? Choose the best answer below.

Revolt · Accepted Answer

No, cells cannot live without mitochondria and chloroplasts; they provide the energy cells need to survive.

Question 9

Check the statements below that provide evidence for the endosymbiotic theory.

Revolt · Accepted Answer

Mitochondria and chloroplasts grow independently from the cell.; Prokaryotic cells, mitochondria, and chloroplasts are all the same size.; Mitochondria and chloroplasts contain their own ribosomes.

Cell Theory Answers

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