A) perform the Calvin cycle at night. B) store CO2 in bundle-sheath cells. C) capture CO2 at night. D) specifically avoid photorespiration. E) All of these choices are correct. A) perform the Calvin cycle at night. B) store CO2 in bundle-sheath cells. C) capture CO2 at night. D) specifically avoid photorespiration. E) All of these choices are correct.

Which of the following statements is FALSE regarding CO2 storage in a CAM plant?

A) CO2 is stored as a 4-carbon organic acid. B) CO2 is stored as a result of the activity of PEP carboxylase. C) The storage form is converted to CO2 when sunlight is available. D) CO2 storage allows stomata to be open at night. E) The storage form enters the Calvin cycle as phosphoenol pyruvate. A) CO2 is stored as a 4-carbon organic acid. B) CO2 is stored as a result of the activity of PEP carboxylase. C) The storage form is converted to CO2 when sunlight is available. D) CO2 storage allows stomata to be open at night. E) The storage form enters the Calvin cycle as phosphoenol pyruvate.

Rubisco's affinity for CO2 versus O2 is inversely related to temperature, resulting in _____ as temperatures rise.

A) increased photosynthesis B) increased photorespiration C) a slowing rate of enzymatic reaction D) higher dissolved O2 levels in the chloroplast A) increased photosynthesis B) increased photorespiration C) a slowing rate of enzymatic reaction D) higher dissolved O2 levels in the chloroplast

Exam 29: Plant Structure and Function: Moving Photosynthesis Onto Land

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In a classic (or early) experiment to determine how large the forces are that allow leaves to pull water from the soil, the rate at which water flowed from a reservoir into the cut tip of an actively transpiring plant was _____ the flow rate through the branch tip when it was subsequently attached to a vacuum pump.

(Multiple Choice)

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Question 21

What happens to the tension in the xylem when the stomata close and evaporation stops?

(Multiple Choice)

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Question 22

You decide to plant potatoes in your garden. You watch the above-ground development of each plant and decide to categorize the growth into four main stages: 1) the initial development of the stem and leaves (shoot) 2) the development of flowers and general growth of the shoot 3) a vegetative period where not much growth seems to be happening "4) the harvest of your potato crop (digging up the tubers formed near the base of the stem) In terms of carbohydrate distribution, during what stage is the majority of phloem flow from shoot to root?"

(Multiple Choice)

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Question 23

If water molecules (H₂O) suddenly stopped forming hydrogen bonds with each other, how would water transport in vascular plants change (if at all)?

(Multiple Choice)

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Question 24

Removing plants from an area, as we do when we harvest crops, removes a great deal of nitrogen. One of the ways farmers enable soils to naturally recover nitrogen content is:

(Multiple Choice)

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Question 25

In many soils, there is more than enough phosphorus to support plant growth, but that element is tightly bound to soil particles and thus largely unavailable. Which of the following are potential solutions to this problem for vascular plants?

(Multiple Choice)

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Question 26

What controls the opening and closing of stomata?

(Multiple Choice)

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Question 27

Grapes growing on a vine are observed to shrink during the day, only gaining in size at night. You decide to do an experiment where you freeze the stem supplying a cluster of grapes with a copper clamp cooled to just a few degrees below zero and then thaw it. The rationale for this treatment is that freezing the large-diameter xylem vessels of a vine leads to the formation of air bubbles, but has no long-term effect on phloem transport. In the days following this treatment, you expect to see that, for the grapes in the experimental cluster:

(Multiple Choice)

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Question 28

CAM plants:

(Multiple Choice)

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Question 29

Which of the following statements is FALSE regarding CO₂ storage in a CAM plant?

(Multiple Choice)

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Question 30

Why do vascular plants need phloem? All four of the provided answers are correct. Select the answer that BEST explains the existence of phloem.

(Multiple Choice)

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Question 31

Assuming that transpiration rate remains constant, which of the following requires larger forces pulling water through the xylem?

(Multiple Choice)

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Question 32

Which of the following statements is NOT true about phloem transport of sugars?

(Multiple Choice)

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Question 33

Referring to Figure 29.1, vascular tissue first evolved in which lineage of extant land plants?

(Multiple Choice)

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Question 34

Which of the following properties of guard cells allow them to open and close a stoma?

(Multiple Choice)

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Question 35

Where is carbon stored in a CAM plant before its assimilation into sugars?

(Multiple Choice)

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Question 36

Rubisco's affinity for CO₂ versus O₂ is inversely related to temperature, resulting in _____ as temperatures rise.

(Multiple Choice)

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Question 37

Why do leaves have internal air spaces?

(Multiple Choice)

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Question 38

Measurements of the diameter of a plant stem during a long drought show a gradual decrease in diameter over time and then a sudden return to almost its original diameter, even as the drought continues. Which of the following hypotheses is the MOST likely explanation for the increase in stem diameter?

(Multiple Choice)

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Question 39

The presence of high concentrations of salts in the soil poses a problem for plants because:

(Multiple Choice)

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Question 40

Showing 21 - 40 of 179

Exam 29: Plant Structure and Function: Moving Photosynthesis Onto Land

What happens to the tension in the xylem when the stomata close and evaporation stops?

If water molecules (H2O) suddenly stopped forming hydrogen bonds with each other, how would water transport in vascular plants change (if at all)?

Removing plants from an area, as we do when we harvest crops, removes a great deal of nitrogen. One of the ways farmers enable soils to naturally recover nitrogen content is:

In many soils, there is more than enough phosphorus to support plant growth, but that element is tightly bound to soil particles and thus largely unavailable. Which of the following are potential solutions to this problem for vascular plants?

What controls the opening and closing of stomata?

CAM plants:

Which of the following statements is FALSE regarding CO2 storage in a CAM plant?

Why do vascular plants need phloem? All four of the provided answers are correct. Select the answer that BEST explains the existence of phloem.

Assuming that transpiration rate remains constant, which of the following requires larger forces pulling water through the xylem?

Which of the following statements is NOT true about phloem transport of sugars?

Referring to Figure 29.1, vascular tissue first evolved in which lineage of extant land plants?

Which of the following properties of guard cells allow them to open and close a stoma?

Where is carbon stored in a CAM plant before its assimilation into sugars?

Rubisco's affinity for CO2 versus O2 is inversely related to temperature, resulting in _____ as temperatures rise.

Why do leaves have internal air spaces?

The presence of high concentrations of salts in the soil poses a problem for plants because:

Life: Chemical, Cellular, and Evolutionary Foundations

The Molecules of Life

Nucleic Acids and Transcription

Translation and Protein Structure

Organizing Principles: Lipids, Membranes, and Cell Compartments

Making Life Work: Capturing and Using Energy

Cellular Respiration: Harvesting Energy From Carbohydrates and Other Fuel Molecules

Photosynthesis: Using Sunlight to Build Carbohydrates

Cell Signaling

Cell and Tissue Architecture: Cytoskeleton, Cell Junctions, and Extracellular Matrix

Cell Division: Variations, Regulation, and Cancer

Dna Replication and Manipulation

Genomes

Mutation and Dna Repair

Genetic Variation

Mendelian Inheritance

Inheritance of Sex Chromosomes, Linked Genes, and Organelles

The Genetic and Environmental Basis of Complex Traits

Genetic and Epigenetic Regulation

Genes and Development

Evolution: How Genotypes and Phenotypes Change Over Time

Species and Speciation

Evolutionary Patterns: Phylogeny and Fossils

Human Origins and Evolution

Cycling Carbon

Bacteria and Archaea

Eukaryotic Cells: Origins and Diversity

Being Multicellular

Plant Reproduction: Finding Mates and Dispersing Young

Plant Growth and Development

Plant Defense: Keeping the World Green

Plant Diversity

Fungi: Structure, Function, and Diversity

Animal Nervous Systems

Animal Sensory Systems and Brain Function

Animal Movement: Muscles and Skeletons

Animal Endocrine Systems

Animal Cardiovascular and Respiratory Systems

Animal Metabolism, Nutrition, and Digestion

Animal Renal Systems: Water and Waste

Animal Reproduction and Development

Animal Immune Systems

Animal Diversity

Animal Behavior

Population Ecology

Species Interactions, Communities, and Ecosystems

Biomes and Global Ecology

The Anthropocene: Humans As a Planetary Force

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If water molecules (H₂O) suddenly stopped forming hydrogen bonds with each other, how would water transport in vascular plants change (if at all)?

Which of the following statements is FALSE regarding CO₂ storage in a CAM plant?

Rubisco's affinity for CO₂ versus O₂ is inversely related to temperature, resulting in _____ as temperatures rise.