Question 1

In organic farming, a source of extra nitrogen added to soils as fertilizer comes from:

Accepted Answer

A)  nitrogen gas from the atmosphere. 
B)  natural gas. 
C)  anhydrous ammonia. 
D)  decomposed manure. 
A)  nitrogen gas from the atmosphere. 
B)  natural gas. 
C)  anhydrous ammonia. 
D)  decomposed manure.

Question 2

Which hormone is primarily responsible for the changes in fruit as it ripens?

Accepted Answer

A)  ethylene 
B)  auxins 
C)  gibberellic acid 
D)  IAA 
E)  cytokinins 
A)  ethylene 
B)  auxins 
C)  gibberellic acid 
D)  IAA 
E)  cytokinins

Question 3

What is the function of the second sperm cell in angiosperm reproduction?

Accepted Answer

A)  food source for embryo 
B)  to serve as a backup 
C)  seed 
D)  carpel 
E)  megaspore 
A)  food source for embryo 
B)  to serve as a backup 
C)  seed 
D)  carpel 
E)  megaspore

Question 4

If a scientist states that he has discovered a new plant hormone, he would have to demonstrate that this compound is:

Accepted Answer

A)  made out of cell proteins. 
B)  formed in one part of the plant and had an effect in a different part. 
C)  needed by the plant as a major source of energy. 
D)  a catalyst. 
E)  capable of stimulating differentiating cells to form meristematic tissue . 
A)  made out of cell proteins. 
B)  formed in one part of the plant and had an effect in a different part. 
C)  needed by the plant as a major source of energy. 
D)  a catalyst. 
E)  capable of stimulating differentiating cells to form meristematic tissue .

Question 5

Exposing a cut stem to air interrupts the flow of:

Accepted Answer

A)  carbon dioxide into the stomata. 
B)  water into the vessel elements and tracheids. 
C)  starch in the cortex. 
D)  carbohydrates in the companion cells. 
E)  carbohydrates in the sieve elements. 
A)  carbon dioxide into the stomata. 
B)  water into the vessel elements and tracheids. 
C)  starch in the cortex. 
D)  carbohydrates in the companion cells. 
E)  carbohydrates in the sieve elements.

Question 6

Refer to the figure above and then answer the question that follows.
-Why are the stomata concentrated on the underside of the leaf?

Accepted Answer

A)  This location allows them to hide from potential predators. 
B)  Shade reduces water loss. 
C)  The carbon dioxide concentration is higher. 
D)  Photosynthesis occurs only on the underside of leaves. 
A)  This location allows them to hide from potential predators. 
B)  Shade reduces water loss. 
C)  The carbon dioxide concentration is higher. 
D)  Photosynthesis occurs only on the underside of leaves.

Question 7

You find a plant that you think is a legume, and you want to see whether it has nitrogen-fixing bacteria. What would you look for?

Accepted Answer

A)  nitrates in the stems and leaves 
B)  nodules present on the roots 
C)  an enlarged taproot 
D)  an extensive fibrous root system 
E)  lack of root hairs 
A)  nitrates in the stems and leaves 
B)  nodules present on the roots 
C)  an enlarged taproot 
D)  an extensive fibrous root system 
E)  lack of root hairs

Question 8

What is the relationship between fungus and plant roots called, and why is it important?

Accepted Answer

Mycorrhizae; the fun

Question 9

What is the most important gas that plants in drier climates must worry about when carrying out gas exchange with their stomata? Why?

Accepted Answer

water (gas), they ne

Question 10

Xylem tubes are rigid because they include this chemical, not found in phloem, in their cell walls.

Accepted Answer

A)  ribose 
B)  starch 
C)  lignin 
D)  nitrogen 
E)  DNA 
A)  ribose 
B)  starch 
C)  lignin 
D)  nitrogen 
E)  DNA

Question 11

Plant root systems can reduce soil erosion.

Accepted Answer

A) True 
 B)False

Question 12

Pollen is produced by cell divisions inside of the:

Accepted Answer

A)  carpel. 
B)  stigma. 
C)  sepal. 
D)  filament. 
E)  anther. 
A)  carpel. 
B)  stigma. 
C)  sepal. 
D)  filament. 
E)  anther.

Question 13

Identify how plants are able to defend themselves physically and chemically from herbivory.

Accepted Answer

Physical defenses can include spines, th

Question 14

Are plants influenced by hormones in the same way humans are influenced by hormones? Why?

Accepted Answer

Yes, all multicellul

Question 15

Flowers that make pollen only and no seeds lack which part?

Accepted Answer

A)  sepal 
B)  fruit 
C)  petal 
D)  stamen 
A)  sepal 
B)  fruit 
C)  petal 
D)  stamen

Question 16

Guard cells swell and shrink, thus regulating the size of ________ that permit the diffusion of water vapor and other gasses into and out of leaves.

Accepted Answer

A)  stomata opening 
B)  blades 
C)  pedicels 
D)  mesophyll cells 
E)  pith 
A)  stomata opening 
B)  blades 
C)  pedicels 
D)  mesophyll cells 
E)  pith

Question 17

Your parents built a tree house for you when you were 8 years old and 4 feet tall. They placed the tree house on a branch of a tree that was 5 feet above the ground in a tree that was 20 feet tall. You are now 20 years old and 6 feet tall. The tree has grown to be 50 feet tall. How high above the ground is the branch on which the tree house is resting now?

Accepted Answer

A)  4 feet 
B)  35 feet 
C)  20 feet 
D)  50 feet 
E)  5 feet 
A)  4 feet 
B)  35 feet 
C)  20 feet 
D)  50 feet 
E)  5 feet

Question 18

Pruning or lowering the level of a hedge with a hedge trimmer stimulates the hedge to become more bushy because:

Accepted Answer

A)  this stimulates the production of ethylene gas. 
B)  removing the apical meristems makes more auxin, which stimulates lateral branch buds to grow 
C)  removing the lateral buds results in apical dominance under the influence of cytokinins. 
D)  removing the apical meristems makes less ethylene, thereby stimulating lateral branches to grow 
E)  removing the apical meristems results in less auxin, thereby allowing lateral branches to grow 
A)  this stimulates the production of ethylene gas. 
B)  removing the apical meristems makes more auxin, which stimulates lateral branch buds to grow 
C)  removing the lateral buds results in apical dominance under the influence of cytokinins. 
D)  removing the apical meristems makes less ethylene, thereby stimulating lateral branches to grow 
E)  removing the apical meristems results in less auxin, thereby allowing lateral branches to grow

Question 19

Which of the following is the predominant group of plants on Earth?

Accepted Answer

A)  bryophytes 
B)  seedless vascular plants 
C)  gymnosperms 
D)  angiosperms 
E)  algae 
A)  bryophytes 
B)  seedless vascular plants 
C)  gymnosperms 
D)  angiosperms 
E)  algae

Question 20

Plants are in a race for sunlight. What must shorter plants develop in order to compete with larger or taller plants?

Accepted Answer

Shorter plants must develop la

Exam 24: An Introduction to Flowering Plants

In organic farming, a source of extra nitrogen added to soils as fertilizer comes from:

Which hormone is primarily responsible for the changes in fruit as it ripens?

What is the function of the second sperm cell in angiosperm reproduction?

If a scientist states that he has discovered a new plant hormone, he would have to demonstrate that this compound is:

Exposing a cut stem to air interrupts the flow of:

Refer to the figure above and then answer the question that follows. -Why are the stomata concentrated on the underside of the leaf?

You find a plant that you think is a legume, and you want to see whether it has nitrogen-fixing bacteria. What would you look for?

What is the relationship between fungus and plant roots called, and why is it important?

What is the most important gas that plants in drier climates must worry about when carrying out gas exchange with their stomata? Why?

Xylem tubes are rigid because they include this chemical, not found in phloem, in their cell walls.

Plant root systems can reduce soil erosion.

Pollen is produced by cell divisions inside of the:

Identify how plants are able to defend themselves physically and chemically from herbivory.

Are plants influenced by hormones in the same way humans are influenced by hormones? Why?

Flowers that make pollen only and no seeds lack which part?

Guard cells swell and shrink, thus regulating the size of ________ that permit the diffusion of water vapor and other gasses into and out of leaves.

Pruning or lowering the level of a hedge with a hedge trimmer stimulates the hedge to become more bushy because:

Which of the following is the predominant group of plants on Earth?

Plants are in a race for sunlight. What must shorter plants develop in order to compete with larger or taller plants?

A Guide to the Natural World

Chemistry, Water and PH

Lifes Components: Biological Molecules

Lifes Home: The Cell

Lifes Border: The Plasma Membrane

An Introduction to Energy

Deriving Energy From Food

Photosynthesis

Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

Mendel and His Discoveries

Chromosomes and Inheritance

Dna Structure and Replication

Transcription Translation and Regulation

Biotechnology

Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

Microevolution

Macroevolution

The History of Life on Earth

The Evolution of Human Beings

The Diversity of Life 1

The Diversity of Life 2

The Diversity of Life 3

Form and Function in Flowering Plants

The Integumentary Skeletal and Muscular Systems

The Nervous and Endocrine System

The Immune System

Blood and Breath

Digestion, Nutrition and Elimination

Animal Development

Human Reproduction

Populations in Ecology

Communities in Ecology

Ecosystems and Biomes

Animal Behavior

Filters