Question 1

A CO₂ gradient between the inside and outside of a leaf is maintained during photosynthesis because

Accepted Answer

A) energy is expended by the plant to maintain the CO₂ gradient. 
B) the CO₂ concentration outside of the leaf is always increasing. 
C) the CO₂ concentration in the mesophyll is constantly decreasing. 
D) the stomata close whenever more CO₂ is needed. 
A) energy is expended by the plant to maintain the CO₂ gradient. 
B) the CO₂ concentration outside of the leaf is always increasing. 
C) the CO₂ concentration in the mesophyll is constantly decreasing. 
D) the stomata close whenever more CO₂ is needed.

Question 2

The ability of some plants to tolerate extreme cold is known as ________.

Accepted Answer

The answer of The ability of some plants to tolerate...

Question 3

Why is the SLA higher under shade for both shade-tolerant and shade-intolerant plants?

Accepted Answer

A) Shade intolerant plants have larger surface areas. 
B) Leaves tend to be thicker in the shade. 
C) Leaves tend to have larger surface areas to absorb more sunlight. 
D) Shade tolerant plants have larger surface areas. 
A) Shade intolerant plants have larger surface areas. 
B) Leaves tend to be thicker in the shade. 
C) Leaves tend to have larger surface areas to absorb more sunlight. 
D) Shade tolerant plants have larger surface areas.

Question 4

Some terrestrial plants use bicarbonate (HCO3-)as a carbon source for photosynthesis.

Accepted Answer

A) True 
 B)False

Question 5

Wind or water flow functions to reduce the size of the boundary layer of leaves.

Accepted Answer

A) True 
 B)False

Question 6

In tropical regions with distinct wet and dry seasons,plants that drop their leaves at the onset of the dry season are termed drought ________.

Accepted Answer

The answer of In tropical regions with distinct wet and...

Question 7

Allocation of carbon to roots directly increases both respiration and photosynthesis rates.

Accepted Answer

A) True 
 B)False

Question 8

Net carbon uptake per unit time by a plant is directly related to

Accepted Answer

A) the difference between photosynthetic rate and respiration rate. 
B) photosynthetic rate. 
C) respiration rate. 
D) the difference between photosynthetic rate and decomposition rate. 
A) the difference between photosynthetic rate and respiration rate. 
B) photosynthetic rate. 
C) respiration rate. 
D) the difference between photosynthetic rate and decomposition rate.

Question 9

________ are openings in the leaves of terrestrial plants that allow for the uptake of CO₂.

Accepted Answer

The answer of ________ are openings in the leaves of...

Question 10

The ultimate source of carbon from which life is constructed is derived from

Accepted Answer

A) atmospheric carbon dioxide. 
B) respiration. 
C) decomposition. 
D) the consumption of other organisms. 
A) atmospheric carbon dioxide. 
B) respiration. 
C) decomposition. 
D) the consumption of other organisms.

Question 11

The force exerted outward on a plant cell wall by the water contained in the cell is called ________ pressure.

Accepted Answer

The answer of The force exerted outward on a plant...

Question 12

Which of the following is an incorrect statement?

Accepted Answer

A) A large leaf maximizes light interception. 
B) A deeply lobed leaf minimizes heat exchange with the atmosphere. 
C) A thick leaf reduces loss of water via transpiration. 
D) A leaf with a high SLA is generally thin and flexible. 
A) A large leaf maximizes light interception. 
B) A deeply lobed leaf minimizes heat exchange with the atmosphere. 
C) A thick leaf reduces loss of water via transpiration. 
D) A leaf with a high SLA is generally thin and flexible.

Question 13

Compared with plants growing in sunlight,plants growing in shade tend to have a greater

Accepted Answer

A) rate of photosynthesis. 
B) specific leaf area. 
C) light compensation point. 
D) light saturation point. 
A) rate of photosynthesis. 
B) specific leaf area. 
C) light compensation point. 
D) light saturation point.

Question 14

An Acacia seedling grown in shade (50% full sun)is expected to have a ________ net assimilation rate (NAR)and a ________ leaf area ratio (LAR)than an Acacia seedling grown in full sun.

Accepted Answer

A) higher; higher 
B) lower; lower 
C) lower; higher 
D) higher; lower 
A) higher; higher 
B) lower; lower 
C) lower; higher 
D) higher; lower

Question 15

Nitrogen is a plant macronutrient.

Accepted Answer

A) True 
 B)False

Question 16

Plants using the C₄ photosynthetic pathway

Accepted Answer

A) use rubisco to catalyze the reaction between O₂ and RuBP. 
B) have a lower rate of photosynthesis than plants using the C₃ photosynthetic pathway. 
C) divide photosynthesis between mesophyll and bundle sheath cells. 
D) are mostly trees. 
A) use rubisco to catalyze the reaction between O₂ and RuBP. 
B) have a lower rate of photosynthesis than plants using the C₃ photosynthetic pathway. 
C) divide photosynthesis between mesophyll and bundle sheath cells. 
D) are mostly trees.

Question 17

The measure used to describe the free energy of water at any point along the soil-plant-atmosphere continuum is called its ________ potential.

Accepted Answer

The answer of The measure used to describe the free...

Question 18

Plants can reduce water loss by

Accepted Answer

A) closing their stomata. 
B) growing larger leaves. 
C) growing more slowly. 
D) increasing photosynthesis. 
A) closing their stomata. 
B) growing larger leaves. 
C) growing more slowly. 
D) increasing photosynthesis.

Question 19

CAM plants typically live in hot,dry deserts.

Accepted Answer

A) True 
 B)False

Question 20

Submerged aquatic plants typically have stomata.

Accepted Answer

A) True 
 B)False

Exam 6: Plant Adaptations to the Environment

A CO₂ gradient between the inside and outside of a leaf is maintained during photosynthesis because

The ability of some plants to tolerate extreme cold is known as ________.

Why is the SLA higher under shade for both shade-tolerant and shade-intolerant plants?

Some terrestrial plants use bicarbonate (HCO3-)as a carbon source for photosynthesis.

Wind or water flow functions to reduce the size of the boundary layer of leaves.

In tropical regions with distinct wet and dry seasons,plants that drop their leaves at the onset of the dry season are termed drought ________.

Allocation of carbon to roots directly increases both respiration and photosynthesis rates.

Net carbon uptake per unit time by a plant is directly related to

________ are openings in the leaves of terrestrial plants that allow for the uptake of CO₂.

The ultimate source of carbon from which life is constructed is derived from

The force exerted outward on a plant cell wall by the water contained in the cell is called ________ pressure.

Which of the following is an incorrect statement?

Compared with plants growing in sunlight,plants growing in shade tend to have a greater

An Acacia seedling grown in shade (50% full sun)is expected to have a ________ net assimilation rate (NAR)and a ________ leaf area ratio (LAR)than an Acacia seedling grown in full sun.

Nitrogen is a plant macronutrient.

Plants using the C₄ photosynthetic pathway

The measure used to describe the free energy of water at any point along the soil-plant-atmosphere continuum is called its ________ potential.

Plants can reduce water loss by

CAM plants typically live in hot,dry deserts.

Submerged aquatic plants typically have stomata.

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Adaptation and Natural Selection

Animal Adaptations to the Environment

Properties of Populations

Population Growth

Life History

Intraspecific Population Regulation

Species Interactions, population Dynamics, and Natural Selection

Interspecific Competition

Predation

Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Large-Scale Patterns of Biological Diversity

The Ecology of Climate Change

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An Acacia seedling grown in shade (50% full sun)is expected to have a net assimilation rate (NAR)and a leaf area ratio (LAR)than an Acacia seedling grown in full sun.