Plant Science Exam #4

​Plant Science Exam #4

By eduardo vaca

Multiple Choice

Which of the following terms is directly involved in flower reproductive growth and development?

• pollination

• photoperiodism

• vegetative senescence

• juvenile phase change

Multiple Choice

The first step of photosynthesis involves water splitting, followed by hydrogen combining with light energy to form:

• glucose

• carbon dioxide

• ATP and NADPH

• oxygen gas

Multiple Choice

The source of carbon for respiration is:

• atmospheric oxygen

• glucose

• soil minerals

• water vapor

Multiple Choice

A plant that has the ability to follow the sun with its leaves is said to the geotropic.

• true

• false

Multiple Choice

Chlorophyll absorbs most of its energy for photosynthesis from what colors of the light wavelengths?

• green and yellow

• blue and red

• orange and infrared

• ultraviolet and violet

Multiple Choice

A plant that is growing, or stretching, towards the light is experiencing phototropism.

• true

• false

Multiple Choice

The term photoperiodism explains a plant's response to the length of day or night.

• true

• false

Multiple Choice

If a plant has the ability to store excess sugars produced by photosynthesis, where might it store these materials?

• in various storage organs such as roots, stems, fruits, or seeds

• only in it leaves

• only in it flowers

• in converts all excess sugars immediately into new leaves

Multiple Choice

Plants that are classified as CAM plants would mostly be found in which growing environment?

• temperate forests

• tropical rainforests

• arid or desert environments

• alpine tundras

Multiple Choice

Evapotranspiration refers only to the water given off by the plant, no the soil.

• true

• false

Multiple Choice

The best way to define senescence phase change in plants is:

• the period of rapid seedling growth

• the process by which a plant recovers from stress

• the final phase of a plant's life cycle marked by physiological decline, aging, and eventual death

• the development of woody tissues

Multiple Choice

The most effective way to upset the balance in vegetative growth and development is by over-applying phosphorus fertilizer.

• true

• false

Multiple Choice

A flower that is self-sterile is unable to produce viable seeds when pollinated by its own pollen.

• true

• false

Multiple Choice

Plant growth that continues indefinitely from its meristems, even after flowering begins, is known as:

• indeterminate growth

• determinate growth

• vegetative growth

• primary growth

Multiple Choice

Which of the following best describes an annual plant?

• a plant that lives for many years, flowering repeatedly

• a plant that completes its entire life cycle within one growing season and then dies

• a plant that completes its life cycle over two growing seasons

• a plant that loses its leaves seasonally

Multiple Choice

Which of the following is NOT considered one of the four main environmental factors influencing plant growth and development?

• light

• temperature

• Soil pH

• water

Multiple Choice

Vegetative growth and development is best defined as maintaining a proper balance between the:

• production of flowers and fruits

• growth of roots and shoots

• absorption of water and release of oxygen

• photosynthesis and respiration rates

Multiple Choice

When a plant's root system is in soil that is saturated with water and lacking oxygen, it is said to be in an anaerobic condition

• true

• false

Multiple Choice

Which of the following is NOT one of the four essential factors required for photosynthesis?

• carbon dioxide

• water

• sunlight

• high temperatures

Multiple Choice

Carbohydrates are composed solely of carbon and hydrogen

• true

• false

Multiple Choice

Through the process of photosynthesis, the plant is able to produce its own food in the form of carbohydrates or:

• proteins

• lipids

• glucose

• minerals

Multiple Choice

Evapotranspiration calculations are based solely on information about plant transpiration.

• true

• false

Multiple Choice

The two most important gases involved in plant growth are oxygen and nitrogen.

• true

• false

Multiple Choice

Photosynthesis primarily takes place in the mitochondria of plant cells.

• true

• false

Multiple Choice

Respiration is the opposite reaction of photosynthesis. The main energy-related by-product of the respiration reaction is:

• oxygen

• glucose

• ATP

• light

Multiple Choice

Categorizing plants as being either C3, C4, and CAM is indicated by their ability to efficiently metabolize which of the following elements during carbon fixation?

• carbon

• water

• oxygen

• nitrogen

Multiple Choice

Photosynthesis is the chemical reaction of taking carbon dioxide and water in the presence of sunlight to make:

• proteins and fats

• chlorophyll and pigments

• glucose (sugar) and oxygen

• hormones and enzymes

Multiple Choice

Fermentation can best be described as:

• an anaerobic process that produces large amounts of ATP

• the process of breaking down water molecules during photosynthesis

• the synthesis of proteins in plant cells

• an anaerobic metabolic process that converts sugars to acids, gases, or alcohol

Multiple Choice

The best way to define adult phase change in plants is:

• the stage where the plant stops all growth

• the shedding of old leaves

• the development of a strong root system

• the transition phase where a plant becomes reproductively competent, capable of flowering

Multiple Choice

The two colors of the light spectrum that most influence plant photosynthesis are green and yellow.

• true

• false

Multiple Choice

Oxygen released during photosynthesis comes directly from carbon dioxide molecules.

• true

• false

Multiple Choice

Respiration primarily takes place in the chloroplast of plant cells.

• true

• false

Multiple Choice

The source of carbon for photosynthesis come from:

• water

• atmospheric carbon dioxide

• soil nutrients

• stored carbohydrates

Multiple Choice

A plant has the ability to store excess sugars in its stems, leaves, and roots in the form of:

• starch

• lignin

• sucrose

• cellulose

Multiple Choice

Plant growth can best be defined as:

• an increase in water absorption

• the conversion of light energy into chemical enegy

• the process of nutrient uptake from the soil

• an irreversible increase in size, resulting from cell division and enlargement

Multiple Choice

If a C3 plant closes its stomata under high temperature to conserve water, leading to a higher concentration of oxygen than carbon dioxide in the leaf, the plant will stop producing photosynthates. This condition is termed photorespiration. 

• true

• false

Multiple Choice

Which of the following growth hormones is primarily responsible for ripening tomatoes from green to red?

• auxin

• gibberellin

• cytokinin

• ethylene

Multiple Choice

The second step of photosynthesis involves carbon dioxide combining with chemical energy to form:

• glucose

• water and oxygen

• ATP and NADPH

• chlorophyll

Multiple Choice

Dormancy that occurs when inhibitors are present in both the seed embryo and the seed coat is termed:

• embryo dormancy

• coat-imposed dormancy

• conditional dormancy

• double dormancy

Multiple Choice

The best way to define juvenile phase change in plants is:

• the stage when the plant produces its first flowers

• the initial period of a plant's life cycle characterized by vegetative growth

• the process of a plant becoming dormant in winter

• the rapid elongation of the stem