The cell theory states that
- a. all living things are composed of cells.
- b. cells are the smallest units of living organisms.
- c. new cells come from pre-existing cells by cell division.
- d. all of the above.
- e. only a and b are true.
Introduction: Cell theory was given by Schleiden and Schwann along with a contribution from Virchow. Organisms existing in nature can either be unicellular or multicellular. Organisms made up of prokaryotic cells are called prokaryotic organisms and organisms made up of eukaryotic cells are called eukaryotic organisms.
Answer to Problem 1TY
Correct answer: Cell theory states that all living things are composed of cells. Cells are the smallest units of living organisms, and new cells arise from pre-existing cells through cell division. Hence, the correct answer is option d.
Explanation of Solution
Reason for correct answer:
The three parts of cell theory are as follows:
- Cells give rise to all living organisms.
- The smallest units of life for all living organisms are cells.
- Pre-existing cells divide to give rise to new cells with the help of cell division.
Option d. is given as “all of the above”.
According to the cell theory, the smallest units of living organisms are cells. All living things are composed of cells and pre-existing cells give rise to a new cell after undergoing cell division. Hence, the correct answer is option d.
Reasons for incorrect answer:
Option a. is given as, “all living things are composed of cells”.
Cell theory states that “all living organisms are composed of cells”. However, it also states that the smallest units of life are cells and new cells are formed when pre-existing cells undergo cell division. Hence, option a. is incorrect.
Option b. is given as, “cells are the smallest units of living organisms”.
Cell theory states that “cells are the smallest units of living organisms”. However, it also states that cells are the basic unit of all living organisms, and cell division gives rise to new cells from pre-existing cells. Hence, option b. is incorrect.
Option c. is given as, “new cells come from pre-existing cells by cell division”.
Cell theory states that the pre-existing cells give rise to new cells after undergoing cell division. However, it also states that cells are the smallest units of life and they give rise to all living organisms. Hence, option c. is incorrect.
Option e. is given as, “only a and b are true”.
Schleiden and Schwann postulated that cells give rise to all living organisms and are the smallest units of life. However, the contributions of Virchow who said that new cells arise from pre-existing cells through cell division is also added to the cell theory. Hence, option e. is incorrect.
Hence, the options a., b., c., and e. are incorrect.
Thus, according to the cell theory, cells are the smallest units of living organisms, all living organisms are made of cells, and pre-existing cells divide to form new cells.
Want to see more full solutions like this?
Chapter 4 Solutions
Biology
Additional Science Textbook Solutions
Becker's World of the Cell (9th Edition)
Prescott's Microbiology
Human Anatomy
Microbiology: An Introduction
Campbell Biology: Concepts & Connections (8th Edition)
- Which of the following statements is NOT part of the cell theory? a. All organisms are composed of one or more cells. b. Cells come from other cells by division. c. Cells are the smallest living things. d. Eukaryotic cells have evolved from prokaryotic cells.arrow_forwardCell theory states thata. all organisms have cell walls.b. all cellular organisms undergo sexual reproduction.c. all living organisms use cells for energy, either their ownor they ingest cells of other organisms.d. all living organisms consist of cells that come from othercellsarrow_forwardThe cell theory is a list of ideas that describe the functions and importance of cells in living organisms. Which of the following statements is not a part of the cell theory? a) Cells divide to make copies of themselves. b) Cells can form from non-living matter. c) All living things are made of one or more cells. d) Cells are the smallest unit of life.arrow_forward
- . Which of the following is not a part of the cell theory? a Cells come from pre-existing cells. b All living organisms are composed of cells. c The basic unit of life is the cell. d Cells contain membrane-bound organelles.arrow_forwardAccording to cell theory A. all cells have nuclei B. all cells are living C. cells, are fundamental units of all the living organisms D. cells arise from pre-existing cellsarrow_forwardEvery cell is descended from another cell. This idea is part of ______. a. evolution c. the cell theory b. the theory of hereditary d. cell biologyarrow_forward
- The cell theory states:a. Cells form as organelles and molecules become grouped togetherin an organized manner.b. The normal functioning of an organism does not depend on itsindividual cells.c. The cell is the basic unit of life.d. Only eukaryotic organisms are made of cells.arrow_forwardWhich of the following applies the theory that cells are the basic unit of structure and functioning of an organism? A.) Cells undergo mitotic division B.) The flower produces seedpod C.) The red blood cell lack nuclei to carry more oxygen C.) The bats evolve a wing in ordee to flyarrow_forwardWhich of the following is not correct?(a) Robert Brown discovered the cell.(b) Schleiden and Schwann formulated the cell theory.(c) Virchow explained that cells are formed from pre-existing cells.(d) A unicellular organism carries out its life activities within a single cell.arrow_forward
- Which of the following biologist/s proposed that cell is the structural and functional unit of life? A. Robert Brown B. Robert Hooke Theodore Virchow D. Schleiden and Schwann The modern principles of the Cell Theory include the following except A. All cells are basically the same in chemical composition. B. All cells come from pre-existing cells by spontaneous generation. C. All energy flow (metabolism and biochemistry) of life occurs within cells. D. Cells contain hereditary information which is passed from cell to cell during cell division. If you were asked to arrange the components of cell theory, which of the following is the best order of the components of the Cell Theory? I. All living things are composed of one or more cells. II. The cell is the basic unit of life III. All cells arise from preexisting cells. IV. All cells undergo complete development . A. , III, B. , II, C. , III, II, IV D. , II, III, IV Which cell structures are similar in the way they protect, support,…arrow_forwardThe Study of Life discusses themes in biology, how life is organized, the types of cellular life forms, evolution, and the process of scientific thinking. In this post, you will demonstrate an understanding of you've learned about the themes in biology, how life is organized, the types of cellular life forms, evolution, and the process of scientific thinking.arrow_forwardThe three domains of life a. represent variations of the same basic cell type. b. include two different basic cell types. c. consist of three different basic cell types. d. describe current cells but say nothing about their history.arrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College