PLS 170C1 FINAL EXAM
A hypothesis is - correct answer ✔✔A question that can be tested
The Cell Theory states - correct answer ✔✔that cells are the basic organizational unit of living things
How large are plant cells (typically)? - correct answer ✔✔10-100 micrometers in diameter
Which of the following is found in BOTH animal and plant cells? - correct answer ✔✔Mitochondria
All psychoactive drugs are illegal and have no medical use? - correct answer ✔✔False
Plasmolysis - correct answer ✔✔the breakage of the cell wall upon dehydration
What is genetic recombination? - correct answer ✔✔the new combination of maternal and paternal
chromosome segments that result when homologs cross over
Thorns are - correct answer ✔✔modified leaves
Erosion - correct answer ✔✔reduces the top soil available for agricultural land
Prokaryotic cells ... - correct answer ✔✔lack both membrane bound organelles and membrane bound
nuclei.
Stolons are - correct answer ✔✔horizontal stems modified to facilitate plant distribution
Which of the following is the correct RNA sequence for the DNA sequence GCCATAAGT? - correct answer
✔✔CGGUAUUCA
,According to the second law of thermodynamics ______________________. - correct answer ✔✔the
quantity of usable energy declines with each energy transformation
The balanced equation for the generation of sugar from sunlight, water, and CO2 is - correct answer
✔✔6 CO2 + 12 H2O → C6H12O6 + 6 O2 + 6 H2O
A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works
well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed.
Which of these explanations best describes this observation? - correct answer ✔✔Only triazine-resistant
weeds survived and reproduced, so each year more pigweed was triazine-resistant.
Corn was first domesticated in an area of central ________________ at least _______________ years
ago. - correct answer ✔✔Mexico, 5,500
Genetic variation, provided through sexual reproduction, offers more opportunity for offspring to survive
in changing environments. What two aspects of meiosis provide sources of such variation? - correct
answer ✔✔crossing over and independent assortment of chromosomes
Fossilized remains of plants and animals are commonly found in ancient dump sites referred to as
_____________________. - correct answer ✔✔middens
Cassava is a minor crop of importance only to people in Asia. - correct answer ✔✔False
Shellfish can accumulate the toxins produced by algal blooms known as "red tide", and subsequently
poison humans who eat the shellfish. - correct answer ✔✔true
The endosperm is a major part of monocot seeds. In many dicots the_______________________. -
correct answer ✔✔endosperm nutrients are absorbed into the cotyledons
An allele is _________________. - correct answer ✔✔an alternative version of a gene
Adding solutes to a solution will reduce the water potential and cause water to flow in that direction
(from high to low) - correct answer ✔✔True
,The xylem-tension-cohesion theory explains how __________________. - correct answer ✔✔water is
transported in the xylem
Roses and other flowering plants with net-veined leaves are examples of ________. - correct answer
✔✔dicots
Triticale is a hybrid between rye and oats and has lower protein quality than wheat. - correct answer
✔✔False
Which of the following members of the plant kingdom evolved more recently? - correct answer
✔✔Angiosperms
Population growth over the next 50 years will require increases in crop yields with ________________
inputs and ______________ cost to the environment. - correct answer ✔✔lower; minimum
Which of the following is NOT a function of the casparian strip? - correct answer ✔✔the casparian strip
produces root hairs to improve the effective root surface area for water and mineral uptake100
Fungi are heterotrophic meaning they absorb food molecules from living (parasitic) or dead (saprophytic)
organisms. - correct answer ✔✔true
Eukaryotic cells - correct answer ✔✔are found in all multicellular organisms in kingdom plantae, fungi
and animalia.
Which of the following is not an example of a primary tissue type in plants? - correct answer
✔✔secondary xylem
Cacti spines result from a modification of the same plant organ that produces - correct answer ✔✔leaves
Cottonwood, aspen, and willow trees have drab-colored flowers, with no petals, that appear before the
tree's leaves are out in the spring; and they are dioecious. What does that indicate about these trees? -
correct answer ✔✔Their pollen is dispersed by wind.
, The pressure flow model of translocation depends entirely on the existence of mechanisms for loading
sugars into phloem at the _______ regions and for unloading them at the _______ regions. - correct
answer ✔✔source; sink
Annual growth rings are the result of one year of secondary xylem - correct answer ✔✔True
How fast a chemical reaction occurs in a cell depends mostly on which molecules in the cell? - correct
answer ✔✔enzymes
When sugars are actively transported into a cell, what happens to the turgor pressure inside that cell? -
correct answer ✔✔It increases, because water enters and affects turgor pressure.
After pollination in the _______ flower, the stalk pushes the fertilized ovary into the soil where it
matures into a fruit. - correct answer ✔✔peanut
Enzymes are described as catalysts, which means that they ________________. - correct answer
✔✔increase the rate of a reaction without being consumed by the reaction
Pepper, from the berries of Piper nigrum, produces the chemical capsaicin. - correct answer ✔✔false
The NADPH required for the reduction of carbon dioxide during the process of photosynthesis comes
from _______________. - correct answer ✔✔the photo reactions
What color in the absorption spectrum do chlorophyll a and b absorb least? - correct answer ✔✔Green
Which of the following is NOT a part of the carpel? - correct answer ✔✔anther
The study of pollen is called palynology. - correct answer ✔✔True
Which hormone is used commercially to ripen green fruit? - correct answer ✔✔ethylene
A hypothesis is - correct answer ✔✔A question that can be tested
The Cell Theory states - correct answer ✔✔that cells are the basic organizational unit of living things
How large are plant cells (typically)? - correct answer ✔✔10-100 micrometers in diameter
Which of the following is found in BOTH animal and plant cells? - correct answer ✔✔Mitochondria
All psychoactive drugs are illegal and have no medical use? - correct answer ✔✔False
Plasmolysis - correct answer ✔✔the breakage of the cell wall upon dehydration
What is genetic recombination? - correct answer ✔✔the new combination of maternal and paternal
chromosome segments that result when homologs cross over
Thorns are - correct answer ✔✔modified leaves
Erosion - correct answer ✔✔reduces the top soil available for agricultural land
Prokaryotic cells ... - correct answer ✔✔lack both membrane bound organelles and membrane bound
nuclei.
Stolons are - correct answer ✔✔horizontal stems modified to facilitate plant distribution
Which of the following is the correct RNA sequence for the DNA sequence GCCATAAGT? - correct answer
✔✔CGGUAUUCA
,According to the second law of thermodynamics ______________________. - correct answer ✔✔the
quantity of usable energy declines with each energy transformation
The balanced equation for the generation of sugar from sunlight, water, and CO2 is - correct answer
✔✔6 CO2 + 12 H2O → C6H12O6 + 6 O2 + 6 H2O
A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works
well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed.
Which of these explanations best describes this observation? - correct answer ✔✔Only triazine-resistant
weeds survived and reproduced, so each year more pigweed was triazine-resistant.
Corn was first domesticated in an area of central ________________ at least _______________ years
ago. - correct answer ✔✔Mexico, 5,500
Genetic variation, provided through sexual reproduction, offers more opportunity for offspring to survive
in changing environments. What two aspects of meiosis provide sources of such variation? - correct
answer ✔✔crossing over and independent assortment of chromosomes
Fossilized remains of plants and animals are commonly found in ancient dump sites referred to as
_____________________. - correct answer ✔✔middens
Cassava is a minor crop of importance only to people in Asia. - correct answer ✔✔False
Shellfish can accumulate the toxins produced by algal blooms known as "red tide", and subsequently
poison humans who eat the shellfish. - correct answer ✔✔true
The endosperm is a major part of monocot seeds. In many dicots the_______________________. -
correct answer ✔✔endosperm nutrients are absorbed into the cotyledons
An allele is _________________. - correct answer ✔✔an alternative version of a gene
Adding solutes to a solution will reduce the water potential and cause water to flow in that direction
(from high to low) - correct answer ✔✔True
,The xylem-tension-cohesion theory explains how __________________. - correct answer ✔✔water is
transported in the xylem
Roses and other flowering plants with net-veined leaves are examples of ________. - correct answer
✔✔dicots
Triticale is a hybrid between rye and oats and has lower protein quality than wheat. - correct answer
✔✔False
Which of the following members of the plant kingdom evolved more recently? - correct answer
✔✔Angiosperms
Population growth over the next 50 years will require increases in crop yields with ________________
inputs and ______________ cost to the environment. - correct answer ✔✔lower; minimum
Which of the following is NOT a function of the casparian strip? - correct answer ✔✔the casparian strip
produces root hairs to improve the effective root surface area for water and mineral uptake100
Fungi are heterotrophic meaning they absorb food molecules from living (parasitic) or dead (saprophytic)
organisms. - correct answer ✔✔true
Eukaryotic cells - correct answer ✔✔are found in all multicellular organisms in kingdom plantae, fungi
and animalia.
Which of the following is not an example of a primary tissue type in plants? - correct answer
✔✔secondary xylem
Cacti spines result from a modification of the same plant organ that produces - correct answer ✔✔leaves
Cottonwood, aspen, and willow trees have drab-colored flowers, with no petals, that appear before the
tree's leaves are out in the spring; and they are dioecious. What does that indicate about these trees? -
correct answer ✔✔Their pollen is dispersed by wind.
, The pressure flow model of translocation depends entirely on the existence of mechanisms for loading
sugars into phloem at the _______ regions and for unloading them at the _______ regions. - correct
answer ✔✔source; sink
Annual growth rings are the result of one year of secondary xylem - correct answer ✔✔True
How fast a chemical reaction occurs in a cell depends mostly on which molecules in the cell? - correct
answer ✔✔enzymes
When sugars are actively transported into a cell, what happens to the turgor pressure inside that cell? -
correct answer ✔✔It increases, because water enters and affects turgor pressure.
After pollination in the _______ flower, the stalk pushes the fertilized ovary into the soil where it
matures into a fruit. - correct answer ✔✔peanut
Enzymes are described as catalysts, which means that they ________________. - correct answer
✔✔increase the rate of a reaction without being consumed by the reaction
Pepper, from the berries of Piper nigrum, produces the chemical capsaicin. - correct answer ✔✔false
The NADPH required for the reduction of carbon dioxide during the process of photosynthesis comes
from _______________. - correct answer ✔✔the photo reactions
What color in the absorption spectrum do chlorophyll a and b absorb least? - correct answer ✔✔Green
Which of the following is NOT a part of the carpel? - correct answer ✔✔anther
The study of pollen is called palynology. - correct answer ✔✔True
Which hormone is used commercially to ripen green fruit? - correct answer ✔✔ethylene
