Biology: Concepts and Investigations
5th Edition
ISBN: 9781260542202
Author: Marielle Hoefnagels
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 1.1, Problem 3MC
The bacteria in figure 1.8 reproduce asexually, yet they are evolving. What is their source of
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I need explanation for the why the answer is correct? And why would the other options wrong
Bacteria that live in the digestive systems of cows help break down the plants that cows eat, providing nutrients to cows. The digestive systems of cows offer a safe environment in which the bacteria can live and reproduce. Which type of realationship exist between the bacteria and the cows?
According to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as
illustrated. All the following are proof that mitochondria and chloroplast evolved from bacteria, except:
Endosymbiosis in a nutshell:
1. Start with two
2. One bacterium
engulfs the other.
3. One bacterium now
lives inside the other.
independent bacteria.
4. Both bacteria benefit
from the arrangement.
5. The internal bacteria are passed
on from generation to generation.
O a
they each have a double membrane
they have chromosomes similar in shape to their host
they are the size of bacteria
their DNA is different from its host
Chapter 1 Solutions
Biology: Concepts and Investigations
Ch. 1.1 - Does any nonliving object possess all of the...Ch. 1.1 - Prob. 2MCCh. 1.1 - The bacteria in figure 1.8 reproduce asexually,...Ch. 1.2 - What are the goals of taxonomy?Ch. 1.2 - How are domains related to kingdoms?Ch. 1.2 - Prob. 3MCCh. 1.3 - Identify the elements of the experiment summarized...Ch. 1.3 - Prob. 2MCCh. 1.3 - What is the difference between a hypothesis and a...Ch. 1.3 - Prob. 4MC
Ch. 1.3 - Compare and contrast science and technology.Ch. 1.4 - Prob. 1MCCh. 1.4 - How does this story illustrate discovery science?Ch. 1 - Which of the following is smaller than an...Ch. 1 - All of the following are characteristics of life...Ch. 1 - The concentration of salts in blood remains...Ch. 1 - Because plants extract nutrients from soil and use...Ch. 1 - Evolution through natural selection will occur...Ch. 1 - Prob. 6MCQCh. 1 - In an experiment to test the effect of temperature...Ch. 1 - A scientist has just observed a new phenomenon and...Ch. 1 - Prob. 9MCQCh. 1 - Describe each of the five characteristics of life,...Ch. 1 - Imagine two related species of single-celled...Ch. 1 - Prob. 3WIOCh. 1 - Think of an analogy that will help you remember...Ch. 1 - Other than the examples given in the text name an...Ch. 1 - Draw and explain the relationship between...Ch. 1 - Prob. 7WIOCh. 1 - Prob. 8WIOCh. 1 - How are the members of the three domains similar?...Ch. 1 - List each step of the scientific method and...Ch. 1 - Give two examples of questions that you cannot...Ch. 1 - Prob. 1PITCh. 1 - Prob. 2PITCh. 1 - Prob. 3PIT
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- Under the endosymbiotic theory for the origin of the eukaryotic cell. The ancestor of mitochondria and chloroplasts original became part of mutualism with a larger host cell. Which of the following best explains this mutualism? A) The mitochondria and chloroplasts provided specialized reproduction as part of the proto-germ line while the larger host cell provided energy for growth and reproduction. B) The mitochondria and chloroplasts provided gene products that could be used by the larger host cell for improved parasitization. C) The mitochondria and chloroplasts provided molecular energy in return for protection by the larger host cell. D) The mitochondria and chloroplasts produce toxins that the larger cell utilized to defend itself from other cells mutually increasing the defense of all those involved.arrow_forwardThe organism represented below is multicellular, heterotrophic, and completely aquatic. - Offspring resulting from only the process of mitotic cell division Which other characteristics could be used to descri this organism? A) reproduces in a water habitat and is a producer B) carries out photosynthesis and needs oxygen C) deposits cellular wastes on land and decompos dead organisms D) reproduces asexually and is a consumerarrow_forwardA mutation occurs in a single bacterium that causes it to produce a new enzyme. This enzyme helps the bacterium process nutrients more efficiently, increasing the bacterium's odds of survival. Every 30 minutes, the bacteria in the colony divide, passing their genes on to their offspring. Some bacteria survive, while others do not. Because resources are limited, the colony has a steady population of 114 bacteria. The bacterial colony is shown below at three different time intervals. The picture would be here: Assume that the survival trend shown in the diagram continues. At 3.0 hours, the mutant bacteria will make up _____ percent of the entire colony.arrow_forward
- An antibiotic is effective in killing 95% of a population 9) of bacteria that reproduce by the process shown below. Which of the following statements best describes future generations of these bacteria? A) They will be produced by sexual reproduction and will be just as susceptible to the antibiotic. B) They will be produced by asexual reproduction and will be just as susceptible to the antibiotic. C) They will be produced by asexual reproduction and will be more resistant to the antibiotic. D) They will be produced by sexual reproduction and will be more resistant to the antibiotic.arrow_forwardI need explanation for the why the answer is correct? And why would the other options wrongarrow_forwardAn infectious disease research group is studying a microbe that can cause infections and gastrointestinal disease in humans, and which can also survive and reproduce in hamsters. A dormant cyst form of the microbe infects human hosts through fecal-oral transmission if they come in contact with hamster droppings and don’t wash their hands before eating. The organism exhibits active, motile morphological forms at other stages of its life cycle. Sexual reproduction (fusion of haploid gametes) occurs in the hamsters; only asexual reproduction occurs in humans. It has a nucleus, but does NOT have a cell wall. This microbe could be which of the following? Protozoan Fungus Bacterium Virusarrow_forward
- Describe the four phases of bacterial cell division. Where would horizontal gene transfer occur? Where would sporogenesis occur? If antibiotics generally target cells which are growing and dividing as fast as they can, when would antibiotics be most effective? If a culture had 4 cells to begin with and has a generation time of 60 minutes, how long would it take to get 1,048,576 cells?arrow_forwardA mutation occurs in a single bacterium that causes it to produce a new enzyme. This enzyme helps the bacterium process nutrients more efficiently, increasing the bacterium's odds of survival. Every 30 minutes, the bacteria in the colony divide, passing their genes on to their offspring. Some bacteria survive, while others do not. Because resources are limited, the colony has a steady population of 114 bacteria. The bacterial colony is shown below at three different time intervals. Assume that the survival trend shown in the diagram continues. At 3.0 hours, the mutant bacteria will make up how many percent of the entire colony?arrow_forwardWhich of the following is false of bacterial reproduction? Bacterial reproduction is slow in comparison to eukaryotes Bacterial reproduction is asexual The new individuals produced by bacterial reproduction are genetically identical clones Bacteria need to form conjugation tubes in order to reproducearrow_forward
- Why is it favorable for protozoa to replicate with schizogony versus using simple mitosis? what are the different scenarios that can occur with regards to bacterial growth within a thioglycolate tube? Explain why certain bacteria require one classification versus a different classification. A botanist has been using betaproteobacteria to grow his herb garden, because betaproteobacteria require little nutrients to grow. His garden does not grow successfully, so he comes to you for help to develop the herb garden. Which class of gram negative bacteria would you suggest and why? Why was the botanist’s original idea not going to work?arrow_forwardConjugation differs from reproduction because conjugation: O A) replicates DNA B) transfers DNA vertically, to new cells O C) transfers DNA horizontally, to cells in the same generation D) transcribes DNA to RNAarrow_forward13) A certain bacterial colony originated from the division of a single bacterial cell. Each cell in this colony will most likely A) express adaptations unlike those of the other cells B) synthesize the same proteins and enzymes C) have a resistance to different antibiotics D) replicate different numbers of genesarrow_forward
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