UMKC BIO 109 EXAM 2 STUDY GUIDE
COMPLETE ANSWERS
In the logistic equation dN/dt = rN , r is a measure of the population's intrinsic rate of
increase. It is determined by which of the following? - ANSWER-birth rate and death
rates
Big-bang reproduction like that involving the agave plant is an example of? -
ANSWER-semelparity
What type of population would be associated with a population pyramid that had an
extremely broad base? - ANSWER-a rapidly expanding population
Which of the following is true about secondary consumers in an ecosystem? -
ANSWER-They are fewer in number than are primary consumers.
What is the fundamental difference between matter and energy? - ANSWER-Matter
is cycled through ecosystems; energy is not.
Which of the following organisms is most likely to be located at the apex of the
pyramid of biomass? - ANSWER-Hawk
The energy diagram for a grasshopper reveals the following: For every 300 J of plant
material consumed, 100 J end up in the feces, 150 J is used up during cellular
respiration and 50 J is incorporated into new biomass. What is the production
efficiency of the grasshopper? - ANSWER-25%
Which of the following statements is correct about biogeochemical cycling? -
ANSWER-The phosphorus cycle is a sedimentary cycle that involves the weathering
of rocks.
Which of the following describes carbon dioxide, methane, and water vapor re-
reflecting infrared radiation back toward Earth? - ANSWER-greenhouse effect
In the etiolation response, the function of protein kinases 1 and 2 is to - ANSWER-
activate specific transcription factors in the nucleus
Slowing of stem elongation, thickening and curvature of the stem to start growing
horizontally are all part of a growing shoot's response to - ANSWER-ethylene
Transcriptional regulation and post-translational modification are most closely
associated with which stage of a signal transduction pathway? - ANSWER-response
In addition to absorbing water and minerals from the soil, this type of root provides
enhanced anchoring of the plant to the substrate. - ANSWER-taproot
These sugar-conducting cells lack nuclei and ribosomes and are intimately
associated with companion cells. - ANSWER-sieve-tube elements
, As a youngster, you drive a nail in the trunk of a young tree that is 3 meters tall. The
nail is about 1.5 meters from the ground. Fifteen years later, you return and discover
the tree has grown to a height of 30 meters. The nail is now __________ meters
above the ground. - ANSWER-1.5
Suppose George Washington completely removed the bark from around the base of
a cherry tree but was stopped by his father before cutting the tree down. The leaves
retained their normal appearance for several weeks, but the tree eventually died.
The tissue(s) that George left functional was (were) the - ANSWER-xylem.
Photosynthesis ceases when leaves wilt, mainly because - ANSWER-stomata close,
preventing CO2 from entering the leaf
If ΨP = 0.3 MPa and ΨS = -0.45 MPa, the resulting Ψ is - ANSWER--0.15 MPa.
What regulates the flow of water through the xylem? - ANSWER-the evaporation of
water from the leaves
The early morning sun stimulates stomata to open by - ANSWER-stimulating the
activity of proton pumps in the plasma membrane of guard cells
Molecules are transported within a plant from root hair to the vascular cylinder
utilizing pathway B shown on the right. Which route is utilized by this molecule for
transport? - ANSWER-Apoplastic route
The value for Ψ in flaccid leaf cells is -0.7 MPa. If you take the leaf tissue and place
it in a 0.4 M solution of sucrose (Ψ = -0.9), net water flow would lead to - ANSWER-
plasmolysis
In leaf sieve-tube elements, the concentration of sucrose is significantly greater than
in the surrounding mesophyll cells. The mechanism responsible for this difference is
- ANSWER-a H+ gradient generated by proton pumps in companion cells and sieve-
tube elements
The mature embryo sac (female gametophyte) contains - ANSWER-3 antipodal
cells, 2 polar nuclei, 2 synergids and 1 egg cell
In the alteration of generations in plants the formation of gametes from sporophytes
requires which process(es) to have occurred - ANSWER-meiosis and mitosis
Mayflies swarm in great numbers to increase their chances of mating. This behavior
exemplifies which type of dispersion - ANSWER-clumped
Salmon return to fresh-water streams to spawn, producing thousands of eggs in a
single opportunity before they die. This type of life history event is an example of -
ANSWER-A) big-bang reproduction
B) semelparity
COMPLETE ANSWERS
In the logistic equation dN/dt = rN , r is a measure of the population's intrinsic rate of
increase. It is determined by which of the following? - ANSWER-birth rate and death
rates
Big-bang reproduction like that involving the agave plant is an example of? -
ANSWER-semelparity
What type of population would be associated with a population pyramid that had an
extremely broad base? - ANSWER-a rapidly expanding population
Which of the following is true about secondary consumers in an ecosystem? -
ANSWER-They are fewer in number than are primary consumers.
What is the fundamental difference between matter and energy? - ANSWER-Matter
is cycled through ecosystems; energy is not.
Which of the following organisms is most likely to be located at the apex of the
pyramid of biomass? - ANSWER-Hawk
The energy diagram for a grasshopper reveals the following: For every 300 J of plant
material consumed, 100 J end up in the feces, 150 J is used up during cellular
respiration and 50 J is incorporated into new biomass. What is the production
efficiency of the grasshopper? - ANSWER-25%
Which of the following statements is correct about biogeochemical cycling? -
ANSWER-The phosphorus cycle is a sedimentary cycle that involves the weathering
of rocks.
Which of the following describes carbon dioxide, methane, and water vapor re-
reflecting infrared radiation back toward Earth? - ANSWER-greenhouse effect
In the etiolation response, the function of protein kinases 1 and 2 is to - ANSWER-
activate specific transcription factors in the nucleus
Slowing of stem elongation, thickening and curvature of the stem to start growing
horizontally are all part of a growing shoot's response to - ANSWER-ethylene
Transcriptional regulation and post-translational modification are most closely
associated with which stage of a signal transduction pathway? - ANSWER-response
In addition to absorbing water and minerals from the soil, this type of root provides
enhanced anchoring of the plant to the substrate. - ANSWER-taproot
These sugar-conducting cells lack nuclei and ribosomes and are intimately
associated with companion cells. - ANSWER-sieve-tube elements
, As a youngster, you drive a nail in the trunk of a young tree that is 3 meters tall. The
nail is about 1.5 meters from the ground. Fifteen years later, you return and discover
the tree has grown to a height of 30 meters. The nail is now __________ meters
above the ground. - ANSWER-1.5
Suppose George Washington completely removed the bark from around the base of
a cherry tree but was stopped by his father before cutting the tree down. The leaves
retained their normal appearance for several weeks, but the tree eventually died.
The tissue(s) that George left functional was (were) the - ANSWER-xylem.
Photosynthesis ceases when leaves wilt, mainly because - ANSWER-stomata close,
preventing CO2 from entering the leaf
If ΨP = 0.3 MPa and ΨS = -0.45 MPa, the resulting Ψ is - ANSWER--0.15 MPa.
What regulates the flow of water through the xylem? - ANSWER-the evaporation of
water from the leaves
The early morning sun stimulates stomata to open by - ANSWER-stimulating the
activity of proton pumps in the plasma membrane of guard cells
Molecules are transported within a plant from root hair to the vascular cylinder
utilizing pathway B shown on the right. Which route is utilized by this molecule for
transport? - ANSWER-Apoplastic route
The value for Ψ in flaccid leaf cells is -0.7 MPa. If you take the leaf tissue and place
it in a 0.4 M solution of sucrose (Ψ = -0.9), net water flow would lead to - ANSWER-
plasmolysis
In leaf sieve-tube elements, the concentration of sucrose is significantly greater than
in the surrounding mesophyll cells. The mechanism responsible for this difference is
- ANSWER-a H+ gradient generated by proton pumps in companion cells and sieve-
tube elements
The mature embryo sac (female gametophyte) contains - ANSWER-3 antipodal
cells, 2 polar nuclei, 2 synergids and 1 egg cell
In the alteration of generations in plants the formation of gametes from sporophytes
requires which process(es) to have occurred - ANSWER-meiosis and mitosis
Mayflies swarm in great numbers to increase their chances of mating. This behavior
exemplifies which type of dispersion - ANSWER-clumped
Salmon return to fresh-water streams to spawn, producing thousands of eggs in a
single opportunity before they die. This type of life history event is an example of -
ANSWER-A) big-bang reproduction
B) semelparity
