Plant Science and Agriculture Quiz

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Questions and Answers

Which crop is most commonly consumed in North American diets?

  • Rice
  • Corn
  • Wheat (correct)
  • Barley

Half of the protein consumed by people worldwide comes from legumes.

False (B)

Name two of Canada's main crops.

Wheat and canola

Avocados come from _______ plants.

<p>broad-leaf</p> Signup and view all the answers

Match the following plant parts with their corresponding foods:

<p>Lettuce = Leaves Potatoes = Roots Cinnamon = Bark Coffee = Seeds</p> Signup and view all the answers

What percentage of human dietary protein comes from legumes?

<p>15% (A)</p> Signup and view all the answers

All vegetable crops come from flowering plants.

<p>True (A)</p> Signup and view all the answers

Which plant parts consist of edible fruits?

<p>Bananas, apples, strawberries, and oranges</p> Signup and view all the answers

What percentage of the human food supply is primarily based on the cultivation of just a few plant species?

<p>14 species (A)</p> Signup and view all the answers

Plants provide building materials but do not produce oxygen for humans.

<p>False (B)</p> Signup and view all the answers

Name two products, other than food, that come from plants.

<p>Medicines and building materials.</p> Signup and view all the answers

The process by which plants produce oxygen is called _______.

<p>photosynthesis</p> Signup and view all the answers

Match the following roles of plants with their descriptions:

<p>Food = Source of nutrition for humans and animals Medicines = Used for treating ailments and health issues Building materials = Components for construction and furniture Biofuels = Renewable energy sources produced from plant materials</p> Signup and view all the answers

What was one significant development that occurred as humans began to cultivate plants?

<p>Improvement in food quantity and quality (A)</p> Signup and view all the answers

Sustainable development ensures future generations will have limited resources.

<p>False (B)</p> Signup and view all the answers

What is one environmental benefit of using plants for energy?

<p>Reduction of fossil fuel dependence.</p> Signup and view all the answers

Which tree species is the most shade-tolerant and eventually replaces the sugar maple and beech trees?

<p>Hemlock (A)</p> Signup and view all the answers

Which plant is used for treating Parkinson's disease?

<p>Cowage (C)</p> Signup and view all the answers

In forest succession, the interior of the forest becomes brighter as the canopy fills in.

<p>False (B)</p> Signup and view all the answers

Morphine is derived from the leaves of the Poppy plant.

<p>False (B)</p> Signup and view all the answers

Name two bird species that prefer open forests.

<p>White-throated sparrow and ruffed grouse</p> Signup and view all the answers

What is one potential benefit of using biofuels instead of fossil fuels?

<p>They may reduce greenhouse gas emissions. (A)</p> Signup and view all the answers

What drug is derived from the Pacific yew and is used for treating ovarian cancer?

<p>Taxol</p> Signup and view all the answers

After a disturbance, fast-growing __________ species quickly move in before being replaced by perennials.

<p>annual</p> Signup and view all the answers

The drug _____ is used as an anti-inflammatory and is derived from the Autumn crocus.

<p>Colchicine</p> Signup and view all the answers

Match the stages of forest succession with their corresponding dominant species:

<p>Stage 1 = Annual species Stage 2 = Perennials and shrubs Stage 3 = Slow-growing trees Stage 4 = Hemlock</p> Signup and view all the answers

Biofuels can be produced using non-plant sources.

<p>False (B)</p> Signup and view all the answers

What happens to soil moisture during forest succession?

<p>Increases (B)</p> Signup and view all the answers

Match the following drugs with their corresponding uses:

<p>Digitalis = Pain killer Quinine = Malaria treatment Scopolamine = Sedative Vincristine = Hodgkin's disease</p> Signup and view all the answers

Name two Canadian plants that are commonly used to produce biofuel.

<p>Canola and corn</p> Signup and view all the answers

Which of the following plants has a use in treating Hodgkin's disease?

<p>Rosy periwinkle (A)</p> Signup and view all the answers

The 1988 fires in Yellowstone National Park burned less than half of the park.

<p>True (A)</p> Signup and view all the answers

Governments encourage the development of biofuels to reduce __________ emissions.

<p>greenhouse gas</p> Signup and view all the answers

Aspirin is derived from the bark of the willow tree.

<p>True (A)</p> Signup and view all the answers

As succession occurs, the abundance and diversity of __________ and soil insects increases in the forest.

<p>small mammals</p> Signup and view all the answers

What is one concern associated with the use of biofuels?

<p>Potential rise in food prices. (D)</p> Signup and view all the answers

Which plant is known for its anti-inflammatory and birth control uses derived from wild yam?

<p>Diosgenin</p> Signup and view all the answers

Match the following biofuels with their primary source:

<p>Bioethanol = Sugarcane Biodiesel = Canola</p> Signup and view all the answers

Growing crops for biofuels has no impact on food availability.

<p>False (B)</p> Signup and view all the answers

What is the main goal of the activity described in relation to biofuels?

<p>To assess the total environmental impact of a selected biofuel.</p> Signup and view all the answers

What combination of factors contributed to the initial destruction of vegetation in Sudbury?

<p>Logging, acid deposition, and acidic soils with high metal levels (C)</p> Signup and view all the answers

After 1972, Sudbury's air emissions have increased significantly.

<p>False (B)</p> Signup and view all the answers

What material was spread on the Barrens to help reduce soil acidity?

<p>lime</p> Signup and view all the answers

The successful grass species added to the ecosystem were tolerant of heavy metal __________.

<p>pollution</p> Signup and view all the answers

Which tree species are now found in the restored areas of Sudbury?

<p>White birch, trembling aspen, and willow (A)</p> Signup and view all the answers

Match the steps in the restoration process with their purposes:

<p>Spreading lime = Reducing soil acidity Adding grass seeds = Tolerating heavy metal pollution Planting tree seedlings = Reintroducing tree species Legumes fix nitrogen = Improving soil nutrient availability</p> Signup and view all the answers

Secondary succession is effective for all human-disturbed habitats.

<p>False (B)</p> Signup and view all the answers

What was the first step taken in the restoration of the Barrens?

<p>spreading lime</p> Signup and view all the answers

Flashcards

Biofuels: What are they?

The use of plants and plant-derived materials for energy production, often focusing on renewable sources.

Photosynthesis: What is it?

The process where plants convert sunlight into energy, producing oxygen as a byproduct.

Plant Domestication: How did agriculture begin?

Cultivating plants for food, intentionally selecting and breeding them for better yields and qualities.

Sustainable Development: What is it?

A set of practices that aim to meet current needs without jeopardizing the future generations' ability to meet theirs.

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Ecosystem Services: What are they?

The many benefits provided by nature that support human life, including clean air, water, and food.

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Human Food Supply: What are the core plants?

The cultivation of a very limited number of plants, providing most of the world's food supply.

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Food Security: What's the risk?

The dependence on a small number of plant species for our food, making us vulnerable to disruptions in their production.

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Biofuels: What are the tradeoffs?

Considering both the benefits and downsides of using biofuels, factoring in environmental impact, economic costs, and social implications.

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What are Canada's main crops?

The main crops grown in Canada, ranked by income generated, are wheat, canola, barley, corn, soybeans, potatoes, flax, and oats.

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What parts of a plant are edible?

Foods derived from all plant parts are consumed by humans. Leaves, stems, roots, seeds, fruits, and spices and herbs are all part of our diet.

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What type of plants produce wheat?

Wheat is one of the most grown crops in Canada and is a product of flowering plants called angiosperms.

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Are cereal grains fruits?

Cereal grains are fruits of grass species. They are a vital food source for humans and domesticated animals alike. Examples of cereal grains include corn, rice, and wheat.

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Which regions consume the most rice and wheat?

Rice is the most important cereal grain in Asia, while wheat is the most common grain in North America and Europe.

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What is the importance of legumes in human diet?

Legumes, belonging to the pea and bean family, are another vital food source, providing approximately 15% of human dietary protein. Examples of legumes include lentils and okra.

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What parts of plants are spices?

Spices are flavored plant parts, such as cinnamon from bark, vanilla and black pepper from fruits, cardamom from seeds, and cloves from flowers.

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What is saffron, and how is it obtained?

Saffron, a highly expensive herb, is derived from the manual harvesting of the male floral parts of a crocus flower.

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Plant-derived drug

A substance extracted from plants that can be used to treat medical conditions.

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Colchicine

A chemical found in the autumn crocus used to reduce inflammation and fight cancer.

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L-Dopa

A compound derived from cowage seeds used to treat Parkinson's disease.

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Digitalis, digitoxin, digoxin

A group of chemicals extracted from foxglove leaves that regulate heart rhythm.

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Scopolamine

A substance found in jimsonweed seeds that has sedative qualities.

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Taxol

A chemical extracted from Pacific yew bark that is effective against ovarian cancer.

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Morphine

A powerful painkiller derived from opium poppies.

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Vinblastine, vincristine

Chemicals from rosy periwinkle, used against Hodgkin's disease and leukemia.

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Ecological Succession

The gradual replacement of one plant community by another over time, often leading to a more complex and stable ecosystem.

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Primary Succession

The initial stage of succession, where pioneer species, like fast-growing weeds, colonize a previously barren area.

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Secondary Succession

The stage of succession that occurs after a disturbance, such as a fire or logging, on an area that previously had vegetation.

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Dominant Tree Species

The dominant tree species in a forest community, which strongly influence the other species present and the overall ecosystem characteristics.

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Forest Canopy Closure

The process by which the environment within a closing forest canopy changes, favoring shade-tolerant species.

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Forest Succession

The gradual changes in species composition and environmental conditions that occur over time in a forest as it matures.

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Shade Tolerance

The ability of a species to survive and thrive in low light conditions, typically found in mature forests.

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Fast Growth Rate

The ability of a species to grow and reproduce quickly, often seen in pioneer species during early successional stages.

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What is a biofuel?

Fuel made from organic matter such as plants or animal waste.

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What is the goal of using biofuels?

Using biofuels instead of fossil fuels is becoming increasingly popular as a strategy to reduce greenhouse gas emissions but can also have negative effects. It can be used as a primary fuel source (like ethanol in gasoline) or blended with other fuels.

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What are the potential costs of using biofuels?

The possible downsides of biofuel use, including higher food prices and environmental side effects from large-scale agriculture.

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How do we understand the environmental impact of a biofuel?

Measuring the full impact of a biofuel on the environment, including greenhouse gas emissions, land use, and the impact on food production.

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What is photosynthesis in relation to biofuels?

The process of converting sunlight into energy in plants, which is a key factor in biofuel production as plants store this solar energy.

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What is plant domestication in relation to biofuels?

The practice of cultivating specific plant species for food, sometimes leading to land use changes for biofuel production.

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How can biofuel production affect food security?

The availability of adequate food for everyone, which can be affected by land use changes for biofuel production.

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What is the debate about biofuel mandates?

A decision about whether or not the government should mandate the use of a certain percentage of biofuel in all fuels.

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What caused the Sudbury Barrens?

The Sudbury Barrens were created by severe environmental damage caused by smelters, leading to large areas devoid of life.

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How were the Sudbury Barrens restored?

The restoration of the Sudbury Barrens involved reducing air pollution, improving soil acidity, and introducing plants to kickstart natural recovery.

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How did lime help the Sudbury Barrens?

Reduced air pollution allowed plants to grow, but the acidic soil with high metal levels remained a challenge. Spreading lime helped lower acidity, making the soil suitable for plant life.

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What's the connection between the Sudbury Barrens restoration and natural processes?

The restoration process mimicked the natural process of 'secondary succession' by introducing grasses and legumes to improve soil quality and allow trees to thrive.

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What is the key lesson from the Sudbury Barrens restoration?

The successful restoration of the Sudbury Barrens demonstrates how human actions can negatively impact ecosystems, but also how we can work to repair them.

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Can all human-caused environmental damage be restored by succession alone?

Many human-caused disturbances are too large or frequent to allow natural recovery through succession.

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How is the Sudbury Barrens restoration related to biodiversity?

The diversity of species is essential for a healthy ecosystem. The Sudbury Barrens restoration showcased the importance of plant communities in restoring a damaged environment.

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What is the message of hope from the Sudbury Barrens story?

The successful restoration of the Sudbury Barrens provides hope that human actions, like pollution reduction and careful land management, can help reverse environmental damage.

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Study Notes

Plants: Anatomy, Growth, and Function

  • Plants play crucial roles in nature and society, providing food, medicines, building materials, and energy.
  • Human food supply primarily comes from a small number of plant species.
  • Canola, a variety of rapeseed, is a key Canadian export, used for oil and biodiesel.
  • Plants are used in numerous industrial applications, including inks, paints, plastics, and dyes.
  • Plants provide essential ecosystem services, benefiting human populations and sustaining environmental balance.
  • Sustainable forestry and agriculture prioritize maintaining biodiversity and resource availability for future generations.
  • Canada's Aboriginal peoples have a long history of utilizing plants for medicinal purposes.
  • Plant-based medicines are crucial in modern healthcare, and many prescription and non-prescription drugs are derived from plants.
  • The demand for sustainable plant-based products is increasing due to concerns about fossil fuels and greenhouse gas emissions.

Plants and People

  • Early humans relied on wild plants as a primary food source, later developing agriculture to produce food more reliably.
  • Today, a small number (approximately 14) of plant species form the basis of most human food.
  • Wheat, canola, barley, corn, soybeans, potatoes are significant Canadian crops.
  • Cereal grains are a crucial food source for both humans and domesticated animals.
  • Edible plants vary significantly from flowering plants (angiosperms) to broad-leaf plants.

Plants as a Source of Pharmaceuticals

  • Plants have been widely used traditionally in medicine.
  • Many modern medicines are derived from plant compounds.
  • Examples include Aspirin (acetylsalicylic acid), extracted from willow bark; chemicals used in cancer treatments; laxatives, and stimulants from plants.
  • Plant-based drugs represent approximately 25% of all drugs prescribed.

Plants as a Source of Fuel

  • Plants are a primary source of fuel for various activities.
  • In the past, wood and peat were the primary energy sources.
  • Now, fossil fuels (coal, oil, and gas) are dominant.
  • Biofuels, produced from plants, are emerging as a renewable alternative to fossil fuels.
  • Ethanol, derived mostly from corn, and biodiesel, based on plant oils like canola, are used.
  • Biofuel production may necessitate land usage for crops, potentially impacting food production and prices.

Plants as Building Materials

  • Wood, from both temperate and tropical hardwoods, is crucial for construction and furniture.
  • Softwoods (like pine and spruce) provide materials for paper and building products.
  • Plant-based materials like inks, paints and plastics are becoming increasingly economical and popular.

Plants and Disturbance and Recovery

  • Natural or human-caused disturbances affect plant communities.
  • Ecological succession refers to the changes in plant communities over time following a disturbance.
  • Primary succession, occurring in areas with no existing soil, involves pioneer species.
  • Secondary succession, following a disturbance that leaves soil intact, is faster than primary succession.
  • Disturbances can contribute to biodiversity by creating different habitats.
  • Disturbances are an important component of the natural community cycle.

Plants and Sustainable Practices

  • Integrating aspects of sustainability in agriculture and forestry is critical to continuing these endeavors.
  • Sustainable agriculture emphasizes maintaining biodiversity, utilizing soil and water resources efficiently, and preventing erosion.

Climax Communities

  • A climax community refers to a mature plant community in a region that is in equilibrium with its environment.
  • Succession patterns are often modified by disturbance in a region.
  • Modern ecological understanding recognizes that climax communities are not always stable and are influenced by multiple factors.
  • Succession is a dynamic process, and communities constantly respond to environmental challenges.

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