1. What are architarchs? These are A. fossils that resemble the ruptured coats of cyanobacteria. B. symbiotic combinations of eukaryotic cells. C. the fossilized remains of diatoms. D. the oldest reputed eukaryotic fossils. 2.How did multicellularity probably evolve? * A. When colonies of cells became more and more independent B. By cellular separation within a coenocyte C. All of these three are correct. D. Many times in the Kingdom Protista

1. What are architarchs? These are A. fossils that resemble the ruptured coats of cyanobacteria. B. symbiotic combinations of eukaryotic cells. C. the fossilized remains of diatoms. D. the oldest reputed eukaryotic fossils. 2.How did multicellularity probably evolve? * A. When colonies of cells became more and more independent B. By cellular separation within a coenocyte C. All of these three are correct. D. Many times in the Kingdom Protista

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter26: Protists

Section: Chapter Questions

Problem 15TYU

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Fossilized stromatolites(A) formed around deep-sea vents.(B) resemble structures formed by bacterial communities that are found today in some shallowmarine bays.(C) provide evidence that plants moved onto landin the company of fungi around 500 million years ago.(D) contain the first undisputed fossils of eukaryotes.
Why is the classification of protists based on DNA sequences useful? * a. Because only protists have DNA b. Because it has confirmed the traditional categories for protists c. Because it has revealed evolutionary relationships, even among organisms that look diffferent d. All of the above are correct This is a required question (2) Why is a species with small population more likely than one with a large population to undergo an extinction? * a. Because small population are exposed to greater environmental changes b. Because genetic diversity is likely to be lower in a small population c. Because the mutation rate is too low d. Because they take too long to produce an offspring.
What is true about organisms that are a part of the same clade? a. They all share the same basic characteristics. b. They evolved from a shared ancestor. c. They all are on the same tree. d. They have identical phylogenies.
Explain how archae are more closely related to Eukarya than to bacteria even though Archae are related. Explain fully a. both are bacteria b. both have cells c. both have nucelus d. both are prokaryotes
Bacteria are similar to archaea in that theya. arose through endosymbiosis.b. are multicellular.c. live in extreme environments.d. are prokaryotes.
Let’s say we’ve just found a single-celled organism living in a pond. This organism has a nucleus, a cell wall, a plasma membrane, chloroplasts, and flagella. What domain/kingdom is it probably in? Group of answer choices A. Fungi B. Eubacteria C. Plantae D. Archaea E. Protista
Biologists at NASA are studying new life forms found in the arctic and have collected an unknown specimen that appears to have a cell membrane, ribosomes and mitochondria. This specimen could be… a.a bacterium b. a virus c. an archaeon d. any one of the above e. a eukaryote
Bacteria that cause the disease typhus are close relatives of bacteria that evolved into _____. a. Protists b. Protocells c. chloroplasts d. mitochondria Among prokaryotes, only the cyanobacteria ______. a. Live near hydrothermal vents b. Produce oxygen during photosynthesis c. Cannot tolerate oxygen d. Have a nucleus-like structure
Which of these protists is believed to have evolved following a secondary endosymbiosis? a. green algae b. cyanobacteria c. red algae d. chlorarachniophytes
The extra energy required for the evolution of the highly complex eukaryotic cell was possible because: a) mesosomes released enzymes into the nucleus b) two types of prokaryotic bacteria became endo symbiotic invaders of the complex cells c) the DNA of the eukaryote cell functions within the nucleoid area d) chloroplasts were able to use O2 to conduct photosynthesis e) the space between the two layers of the nuclear membrane contained mitochondria
How can scientists determine that multicellularity arose more than once in different lineages? Select one: a. Scientists do not know b. Bacteria live as multicellular groups called biofilms c. Animals are more closely related to single-celled eukaryotes than to fungi d. Fungi can produce multicellular structures
What event is thought to have contributed to the evolution of eukaryotes? a. global warming b. glaciation c. volcanic activity d. oxygenation of the atmosphere