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Biology Unit 3 Exam
Terms in this set (77)
In the process of photosynthesis chlorophyll serves as
An energy converter
Which color is least important to a green plant during photosynthetic activities?
Plants bend toward a light source as a result of
An unequal auxin distribution in their stems
In living protists, when does respiration occur?
All the time
Through the use of oxygen 18 (heavy oxygen) scientists have found that the oxygen released during photosynthesis comes from the molecules of
The downward movement of food in vascular plants takes place chiefly through tissue known as
Which organism carries on digestion out of its cells?
Roots and root hairs are plant structures that have become specialized for the function of
Anchorage and Absorption
Most autotrophs store energy in the form of
Organisms capable of manufacturing organic molecules from inorganic raw materials are classified as
The conversion of light energy into chemical bond energy occurs within the cells of
Which wavelength of light would be least favorable for the continued growth of a green plant?
Which structures are found in the veins of a maple leaf?
In which organelles in green plants cells does respiration take place?
Which activity occurs in the stems of a bean plant?
Synthesis of auxins
Which factor stimulates the production of chlorophyll in a bean seedling as it emerges from the ground?
Excess water leaves a plant through the
The oxygen gas produced during photosynthesis comes from
The unequal distribution of auxins in plants results from
Stimuli such as light and gravity
Glucose molecules may be stored in plants in the form of
Which process in plants is most closely associated with the activity of guard cells?
Redwood trees over 250 feet tall are able to transport water to their highest branches. The structures responsible for this transport are
During the process of respiration, which compounds are released from the mitochondria of a green plant?
Carbon Dioxide and Water
Two elements normally obtained from the atmosphere by corn plants for use in their metabolism are
Carbon and Oxygen
Water prepared with O-18 (heavy oxygen) is supplied to a plant in a well-lighted and controlled environment. Upon analysis a short time later, the O-18 would probably be found in
The air surrounding the plant
Organisms that carry on photosynthesis are
In green plant cells, oxygen is used primarily for the process of
Water and minerals move from the soil into a plant by the process of
Diffusion and Active transport
In autotrophic plants, stored starch may be converted into small organic molecules by the process of
The direction of xylem tissue in a maple tree most directly interferes with the movement of
Water to the leaves
Which type of organism can obtain energy as a result of alcoholic fermentation?
Most toxic products of plant metabolism are stored in the
The process by which excess water leaves a plant through the stomates is known as
A florist who wants to speed up the formation of roots on stems cuttings will most likely apply a solution of
Which type of organism synthesizes organic molecules from inorganic raw materials?
The basic raw materials for photosynthesis are
Water and Carbon Dioxide
Which organisms secrete enzymes that digest food outside their cells and then absorbs the simple end-products?
A root hair cell may continue to absorb minerals even though the cytoplasmic concentration of these minerals is greater inside the cell than in the soil. This absorption is accomplished as a result of
When do green plants carry on respiration?
During both the day and night
Plants excrete fewer chemical waste products than animals do. The best explanation for this is that plants
Can reuse more of their waste products than animals can
The oil of the vanilla bean and the oil of mint are flavorings found naturally in these plants. These flavorings are present in these plants as a result of
Synthesis from simpler compounds
Which compounds include growth hormones?
Which organisms are classified as heterotrophs?
What is the end product of photosynthesis?
During which process do root hairs use energy for the absorption of cell minerals?
Which plant cells provide a continuous conducting pathway from the roots to the leaves?
In protists, some of the end-products of the fermentation process include
Ethyl alchohol and Lactic acid
In a lake most algae will produce oxygen as long as energy is available in the form of
Which response usually occurs in plants as a result of unequal auxin distribution?
Stems bend towards light
Raw materials required for autotrophic nutrition in green plants include
Water and Carbon Dioxide
Which energy conversion occurs in the process of photosynthesis?
Light energy is converted to chemical bond energy
An environmental change which would most likely increase the rate of photosynthesis in a bean plant would be an increase in the
Concentration of Carbon Dioxide in the air
Which organism carries on heterotrophic nutrition?
Which activity is an example of intracellular digestion?
A maple tree converting starch to sugar in its roots
Which would be most affected in a plant if root pressure and transpirational pull were not occurring?
The movement of water into the leaves
Plant structures which increase the surface area for water and mineral absorption are known as
The tissue which conducts organic food throughout a vascular plant is composed of
By what process does carbon dioxide pass through stomates into the leaf?
Experimental evidence has shown that auxins are responsible for
Plant growth responses to light and gravity
In most green plants which wavelengths of light are most effective in the conversion of radiant energy into chemical energy or organic compounds?
Red and blue
Within a plant cell the glucose formed as a result of photosynthesis may be used directly as
An energy source during cellular respiration
In which organisms are hydrolytic enzymes present?
Both heterotrophs and autotrophs
The primary function of root hairs in a plant is to
Provide increased surface area for absorption
When a living geranium plant is enclosed in a large jar, water droplets appear on the inner surface of the jar. These water droplets are most likely the direct result of
Transpiration and Condensation
In green plants most gas excretion takes place through
Stomates and lenticels
As a direct result of which life process does a plant make a variety of chemical substances such as poisons drugs, and flavorings?
An isotope is used to trace the chemical reactions of photosynthesis in a green plant. If the isotope is ultimately found in the starch stored in the green plant, the isotope would be
Fungi can absorb food from their environments as a result of
Digestion outside the cells
Cells in the stem of a bean plant receive water and minerals chiefly by
Upward transport through xylem cells
Carbon dioxide enters the moist internal surface of a leaf through
Which structure has a similar function in both a human skin cell and a bean leaf cell?
The movement of materials through vascular plants is similar to circulation in vertebrates because both have
Specialized transport tissues
Which organisms secrete enzymes that digest food outside their cells and then absorb the simple end-products?
Which part of a plant is specialized for anchorage and absorption?
Removing the tip of the stem of a young plant will most directly interfere with the production of
Nitrogenous compounds may be used by plants in the synthesis of
In plants the molecular oxygen concentration of a leaf usually increased during the process of
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