BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Textbook Question
Chapter 1.1, Problem 2MC
The bacteria in figure 1.8 reproduce asexually, yet they are evolving. What is their source of
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The 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 consumer
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
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.
Chapter 1 Solutions
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
Ch. 1.1 - Prob. 1MCCh. 1.1 - The bacteria in figure 1.8 reproduce asexually,...Ch. 1.2 - If the human and kangaroo in figure 1.9 switched...Ch. 1.2 - Prob. 2MCCh. 1.2 - Prob. 3MCCh. 1.3 - Identify the elements of the experiment summarized...Ch. 1.3 - What is a statistically significant result?Ch. 1.3 - Prob. 3MCCh. 1.3 - What are some limitations of scientific inquiry?Ch. 1.3 - Prob. 5MC
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 - Prob. 4MCQCh. 1 - Prob. 5MCQCh. 1 - What is the correct way to write the scientific...Ch. 1 - Prob. 7MCQCh. 1 - A scientist has just observed a new phenomenon and...Ch. 1 - Prob. 9MCQCh. 1 - Prob. 10MCQCh. 1 - Prob. 1WIOCh. 1 - Prob. 2WIOCh. 1 - Prob. 3WIOCh. 1 - Prob. 4WIOCh. 1 - Prob. 5WIOCh. 1 - Think of an analogy that will help you remember...Ch. 1 - Other than the brownie example given in the text,...Ch. 1 - Explain why populations of organisms are typically...Ch. 1 - How are the members of the three domains similar?...Ch. 1 - Give two examples of questions that cannot be...Ch. 1 - If you dissect and label the parts of an...Ch. 1 - List each step of the scientific method and...Ch. 1 - Prob. 13WIOCh. 1 - Review Why We Care 1.1, which describes...Ch. 1 - Prob. 1PITCh. 1 - What is the relationship between natural selection...Ch. 1 - Prob. 3PIT
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- A 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 percent of the entire colony.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_forwardNumber of Bacteria X Temperature (°C) At the After 1 After 2 After 3 beginning day days days 6. 8. 12 15 48 187 15 27 126 678 (a) What is the relationship between the temperature and the rate at which the Bacteria X reproduces? (b) When the number of Bacteria X increases, it causes food to turn bad and cannot be eaten. Based on the results above, what can Rose do to preserve food for a longer period of time? Explain your answer.arrow_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_forwardDescribe 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_forward(if anyone please help me with all these questions) 2. As eukaryotic cells become more specialized, the nucleus is NOT important as the site of a) DNA synthesis, b) changes in the regulation of genes, c) protein synthesis, d) the transcription of mRNA for protein synthesis, e) DNA mutation. 3. In the evolution of the eukaryotic cell, these cells have key changes that include which of the following: a) These cells reproduce by copying their DNA perfectly each generation. b) They have their DNA in the nucleoid area. c) have adapted the mesosome membrane system of the prokaryote to form a nucleus and an endoplasmic reticulum. d) each new type on new eukaryote cell has its own mesosomes e) none of these are true. 4. The evolution/development of the skeletal system found in the Deuterostomes, is made up of two molecules, Ca+2PO4-2 and collagen These molecules are produced released from by a specialized type of stem cell. Therefore, one would expect that these stem cells perform which…arrow_forward
- Which 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_forwardWhy are chloroplasts and mitochondria shown as arrows originating from the Bacteria ?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_forward
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