Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 25, Problem 14RQ
The chromosome complement in a moss protonema is:
- 1n
- 2n
- 3n
- varies with the size of the protonema
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Observe the Volvox for a few minutes. These small green spherical colonies of up to thousands of Chlamydomonas-like cells, are usually slowly rolling around in the water mount.
Is there any type of coordination in a colony like this?
describe the shape of the colony of the Volvox. Label the individual cells and the daughter colonies.
label the somatic and reproductive cells of volvox (please draw on the picture and put arrow)
Chapter 25 Solutions
Biology 2e
Ch. 25 - Figure 25.6 Which of the following statements...Ch. 25 - Figure 25.14 Which of the following statements...Ch. 25 - Figure 25.24 Which of the following statements...Ch. 25 - The land plants are probably descendants of which...Ch. 25 - Alternation of generations means that plants...Ch. 25 - Which of the following traits of land plants...Ch. 25 - How does a haplontic plant population maintain...Ch. 25 - What characteristic of Charales would enable them...Ch. 25 - Which one of these characteristics is present in...Ch. 25 - A scientist sequences the genome of Chara, red...
Ch. 25 - Which of the following features does not support...Ch. 25 - Which of the following structures is not found in...Ch. 25 - Stomata appear in which group of plants? Charales...Ch. 25 - The chromosome complement in a moss protonema is:...Ch. 25 - Why do mosses grow well in the Arctic tundra? They...Ch. 25 - A botanist travels to an area that has experienced...Ch. 25 - Microphylls are characteristic of which types of...Ch. 25 - A plant in the understory of a forest displays a...Ch. 25 - The following structures are found on the...Ch. 25 - The dominant organism in fern is the sperm spore...Ch. 25 - What seedless plant is a renewable source of...Ch. 25 - How do mosses contribute to returning nitrogen to...Ch. 25 - The production of megaphylls by many different...Ch. 25 - Why did land plants lose some of the accessory...Ch. 25 - What is the difference between extant and extinct?Ch. 25 - Describe at least two challenges that cactuses had...Ch. 25 - Describe a minimum of two ways that plants changed...Ch. 25 - To an alga, what is the main advantage of...Ch. 25 - In areas where it rains often, mosses grow on...Ch. 25 - What are the three classes of bryophytes?Ch. 25 - Describe two adaptations that are present in...Ch. 25 - Bryophytes form a monophyletic group that...Ch. 25 - How did the development of a vascular system...Ch. 25 - Which plant is considered the most advanced...Ch. 25 - Ferns are simultaneously involved in promoting...
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- Figure 23.25 Which of the following statements about Paramecium sexual reproduction is false? The macronuclei are derived from micronuclei. Both mitosis and meiosis occur during sexual reproduction. The conjugate pair swaps macronuclei. Each parent produces four daughter cellsarrow_forwardFigure 24.14 Which of the following statements is true? A dikaryotic ascus that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores. A diploid ascus that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A haploid zygote that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A dikaryotic ascus that forms in the ascocarp undergoes plasmogamy, meiosis, and mitosis to form eight ascospores.arrow_forwardWhen Paramecium conjugate: a. cytoplasmic division produces four daughter cells, eachhaving two micronuclei and two macronuclei. b. one haploid micronucleus in each cell remains intact; theother three degenerate. The micronucleus of each cell divides once, producing two nuclei, and each cell exchanges one nucleus with the other cell. In each partner the two micronuclei fuse, forming a diploid zygote micronucleus in each cell. c. the micronucleus of each of the disengaged partners divides meiotically. Macronuclei divide again in each cell, and the original micronucleus breaks down. Each cell has two haploid micronuclei; one of the macronuclei develops into a micronucleus. d. the mating cells join together at opposite sites of their oral depression. e. the micronucleus in each cell undergoes mitosis. When mitosis is complete, there are four diploid macronuclei; the micronucleus then breaks down.arrow_forward
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