Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results. FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart Why is sporophyte formation a good way to determine if fertilization occurred?

Question

Want to see more full solutions like this?

Answer 1

Textbook Question

Chapter 22, Problem 1DAA

Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results.

Chapter 22, Problem 1DAA, Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg

FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart

Why is sporophyte formation a good way to determine if fertilization occurred?

Expert Solution & Answer

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

Normal dive (for diving humans) normal breathing dive normal breathing Oz level CO2 level urgent need to breathe Oz blackout zone high CO2 triggers breathing 6. This diagram shows rates of oxygen depletion and carbon dioxide accumulation in the blood in relation to the levels needed to maintain consciousness and trigger the urgent need to breathe in diving humans. How might the location and slope of the O₂ line differ for diving marine mammals such as whales and dolphins? • How might the location and slope of the CO₂ line differ for diving marine mammals such as whales and dolphins? • • Draw in predicted lines for O2 and CO2, based on your reasoning above. How might the location of the Urgent Need to Breathe line and the O2 Blackout Zone line differ for diving marine mammals? What physiological mechanisms account for each of these differences, resulting in the ability of marine mammals to stay submerged for long periods of time?

foraging/diet type teeth tongue stomach intestines cecum Insectivory numerous, spiky, incisors procumbentExample: moleExample: shrew -- simple short mostly lacking Myrmecophagy absent or reduced in numbers, peg-likeExample: tamandua anteater extremely long simple, often roughened short small or lacking Terrestrial carnivory sharp incisors; long, conical canines; often carnassial cheek teeth; may have crushing molarsExample: dog -- simple short small Aquatic carnivory homodont, spiky, numerousExample: common dolphin -- simple or multichambered (cetaceans only) variable small or absent Sanguinivory very sharp upper incisors; reduced cheek teethExample: vampire bat grooved tubular, highly extensible long small or lacking Herbivory (except nectivores) incisors robust or absent; canines reduced or absent; diastema; cheek teeth enlarged with complex occlusal surfacesExample: beaver -- simple (hindgut fermenters) or multichambered (ruminants) long large Filter feeding none…

3. Shown below is the dental formula and digestive tract anatomy of three mammalian species (A, B, and C). What kind of diet would you expect each species to have? Support your answers with what you can infer from the dental formula and what you can see in the diagram. Broadly speaking, what accounts for the differences? Species A 3/3, 1/1, 4/4, 3/3 པར『ན་ cm 30 Species B 4/3, 1/1, 2/2, 4/4 cm 10 Species C 0/4, 0/0,3/3, 3/3 020

Answer 2

Textbook Question

Chapter 22, Problem 1DAA

Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results.

Chapter 22, Problem 1DAA, Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg

FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart

Why is sporophyte formation a good way to determine if fertilization occurred?

Expert Solution & Answer

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 3

Textbook Question

Chapter 22, Problem 1DAA

Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results.

Chapter 22, Problem 1DAA, Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg

FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart

Why is sporophyte formation a good way to determine if fertilization occurred?

Expert Solution & Answer

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 22, Problem 1DAA

Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg suspected that they sometimes hitch a ride on crawling insects or mites (tiny animals related to spiders). To test this hypothesis he carried out an experiment. He placed patches of male and female moss gametophytes in dishes, either next to one another or with water-absorbing plaster between them. The plaster prevented sperm from Swimming between plants. He then looked at how the presence or absence of insects affected the number of sporophytes formed. FIGURE 22.8 shows his results.

Chapter 22, Problem 1DAA, Insect-Assisted Fertilization in Moss Moss sperm can swim, but plant ecologist Nils Cronberg

FIGURE 22.8 Sporophyte production in female moss patches with and without either crawling insects (springtails) or mites. No Sporophytes formed in the animal-free dishes when moss patches were 2 or 4 centimeters apart

Why is sporophyte formation a good way to determine if fertilization occurred?

Expert Solution & Answer

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.

Answer 8

Expert Solution & Answer

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To determine: The chemical that was produced in the greatest amount and its stimulus.

Concept introduction: Secondary metabolites are produced as metabolic intermediate or product but they are not essential for growth. They play a role in reinforcement of tissues for example cellulose, suberin, lignin; protection, and serve as attractants for pollinators. They contribute in plant’s ability to compete and survive. Volatile compounds are such secondary metabolites produced by plants. They attract insects for pollination as well as provide defensive signaling systems against pests and diseases.

Answer 12

Answer to Problem 1DAA

Correct answer: The chemical β-Caryophyllene was produced in greatest amount in response to the treatment with budworms and thrips.

Answer 13

Explanation of Solution

As given in the problem statement, the researchers studied the production of different volatile chemicals by tobacco plants in response to predation by insects- western flower thrips and tobacco budworms.

Refer Fig. 30.19, “Volatile (airborne) compounds produced by tobacco plants in response to predation by different insects” in the textbook. It shows the results of volatile compounds produced (ng/ day) in untreated plants (C), plants that are mechanically wounded (W), attacked by thrips (T), mechanically wounded and attacked by thrips (WT), attacked by budworms (HV), or attacked by budworms and thrips (HVT). When tobacco plants were treated with budworms and thrips (HVT), the chemical β-Caryophyllene was produced that was measured as 6,166 ng/ day. This was the highest amount of chemical produced among all the treatments.