Concept explainers
Introduction:
Mitosis refers to a nuclear division mechanism that maintains the chromosome number. When a nucleus divides by mitotic cell division, each new nucleus has the same chromosome number as the parent cell.
Answer to Problem 1SQ
Correct answer:
Mitosis and cytoplasmic division play an important role in both asexual reproduction of single-celled eukaryotes and growth and tissue repair in multicelled organisms. Hence, the correct answer is option e.
Explanation of Solution
Reason for correct answer:
Option e. is given as, “both a and b.”
In multicelled species, mitosis and cytoplasmic division are the basis of increases in body size and tissue remodeling, as well as ongoing replacements of damaged cells. Mitosis and cytoplasmic division are also part of asexual reproduction of single-celled eukaryotes. Hence, option e. is correct.
Reason for incorrect answer:
Option a. is given as, “asexual reproduction of single-celled eukaryotes.”
Although mitosis and cytoplasmic division are part of asexual reproduction, they also play an important role in growth and tissue remodeling during development in multicelled organisms. Hence, option a. is incorrect.
Option b. is given as, “growth and tissue repair in multicelled species.”
Mitosis and cytoplasmic division are the basis of growth and tissue remodeling in multicelled-organisms. Mitosis and cytoplasmic division are also part of asexual reproduction. Hence, option b. is incorrect.
Option c. is given as, “gamete formation in bacteria and archaea.”
Gamete formation in bacteria and archaea usually take place by binary fission. Hence, option c is incorrect.
Option d. is given as, “sexual reproduction in plants and animals.”
Meiosis is the basis of sexual reproduction in plants and animals. Hence, option d is incorrect.
Hence, the options a., b., c., and d. are incorrect.
Mitosis and cytoplasmic division are the basis of both asexual reproduction of single-celled eukaryotes and growth in multicelled organisms. Thus, the correct option is e.
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Chapter 11 Solutions
EBK BIOLOGY: CONCEPTS AND APPLICATIONS
- What is one way in which all eukaryotic cells and all prokaryotic cells are similar? a. They reproduce sexually b. They both have ribosomes. b. They are roughly the same size. c. They are contained in a cell membrane. d. They share the same kinds of organelles.arrow_forwardA dikaryotic cell develops into a zygote whena. mitosis divides the two nuclei into separate cells, which thencombine at fertilization.b. mitosis occurs without cytokinesis.c. the two haploid nuclei within the cell fuse.d. meiosis occurs once and cytokinesis occurs twice.arrow_forwardSexual reproduction involves an organism (A.) growing from body parts that are cut or broken off the parent. (B.) being produced through a unique combination of DNA from two gametes. (C.) generating an identical offspring on the surface of its own body. (D.) replicating its DNA before dividing in half to produce two organisms.arrow_forward
- In humans, sexual reproduction that produces an embryo, which then develops into a fetus, requires: a. Neither mitosis or meiosis b. Mitosis c. Both mitosis and meiosisarrow_forwardWhat critical event occurs during the S phase of the eukaryoticcell cycle?a. Cells make a decision of whether or not to divide.b. DNA replication produces pairs of sister chromatids.c. The chromosomes condense.d. The single nucleus is divided into two nucleiarrow_forwardProcess of cell division can take place by: A. heterosis B. fusion C. mitosis D. None of thesearrow_forward
- The metaphase to anaphase transition involves a. new force being generated to pull the chromatids apart. b. an increase in force on sister chromatids to pull them apart. c. completing DNA replication of centromeres allowing chromosomes to be pulled apart. d. loss of cohesion between sister chromatids.arrow_forwardOne of the following is not a function of ordinary cell division produces two daughter cells that are genetically identical Select one: a. Asexual reproduction of an organism b. Cell replacement c. Sexual reproduction d. Growth of an organismarrow_forwardIn which type of human cell would you expect to find a Barr body? A.)A sperm cell B.)A somatic cell in an XY male C.)An ovum D.) A somatic cell in an XX femalearrow_forward
- Diploid cells have a. two chromosomes.b. two sets of chromosomesc. one set of chromosomes.d. two pairs of homologous chromosomesarrow_forwardMitosis occurs in which of the following situations? (select ALL that apply) A. Yeast cells reproducing asexually B. Certain plants that reproduce asexually C. Human adults who have stopped growing taller. D. The production of gamete cells E. Young multicellular organisms growing larger (normal growth) F. The development of a zygote after fertilization has occurred.arrow_forwardAccording to the theory of endosymbiosis, organelles, like mitochondria and chloroplasts, were once free-living cells that were absorbed into another cell. The relationship benefited both cells to stay together. What evidence do scientists observe today that supports the theory of endosymbiosis? Select all that apply. a There are ribosomes found inside mitochondria and chloroplasts just like there are inside cells. b Looking inside mitochondria and chloroplasts, one will find that they each contain their own DNA. c Mitochondria and chloroplasts are found inside all cell types. d Mitochondria and chloroplasts each have a membrane around them just like a cell would.arrow_forward
Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College