The environmental factors influencing microbial growth. Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

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Answer 1

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Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…

Question #5: Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The genes show independent assortment. Recessive alleles at both loci are required for the facultative apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C. At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype. A facultative apomict male, capable of producing viable pollen, was crossed with a sexually reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following temperatures*: a) 15°C? b) 25°C? *for full credit, show crosses and genotypes where appropriate. Remember to position the female first (left side) in the cross. Type your answer here:

Answer 2

Question

Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.

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Answer 3

Question

Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.

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Answer 4

Question

Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.

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Answer 5

Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.

Answer 6

Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.

Answer 7

Chapter 31, Problem 1RC

Summary Introduction

To determine: The environmental factors influencing microbial growth.

Introduction: Growth of a bacterium is defined as the increase in several bacterial cells or populations. The growth rate depends on the time taken by a bacterium to divide into two daughter cells.

Answer 8

Expert Solution & Answer

Explanation of Solution

Numerous environmental factors affect or influence the growth or the death rate of microbes. The fluctuations in the environmental conditions lead to dramatic shifts in population as the growth rate of species start varying to environmental change. Each category of microbes has a fixed range of environmental conditions for optimal growth. The environmental factors influencing the growth rate are temperature, osmotic pressure, pH, and oxygen concentration.