Biology 109 Exam 2 2024/2025 Exam
Questions and Corresponding Answers
with Surety of 100% Pass Mark
Slows cell growth often antagonizing the action of other hormones -
🧠ANSWER ✔✔Abscisic Acid
release from embryo signals seeds to break dormancy and germinate -
🧠ANSWER ✔✔Gibberellins
accumulates in leaves when plant begins to wilt, causing stomata to close
rapidly - 🧠ANSWER ✔✔Abscisic Acid
synthetic forms of this hormone are widely employed as herbicides that
target broad leaf weeds such a dandelions - 🧠ANSWER ✔✔Auxins
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
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STATEMENT. ALL RIGHTS RESERVED
,Transcriptional regulation and post-transcriptional 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
In the figure below right, the cells in the region enclosed by the middle part
of a stem constitute the - 🧠ANSWER ✔✔Zone of elongation
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. How tall is
the nail above the ground? - 🧠ANSWER ✔✔1.5 meters
Based on the ABC model, what would be the structure of a flower that had
normal expression of genes A and B but lacked expression of gene C? -
🧠ANSWER ✔✔Sepal-petal-petal-sepal
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
, 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 that George left functional was the -
🧠ANSWER ✔✔Xylem
This root structure ensures that all water and dissolved substances must
pass through a cell membrane before entering the stele (vascular cylinder)
- 🧠ANSWER ✔✔Casparian strip
Photosynthesis ceases when leaves wilt, mainly becuase - 🧠ANSWER
✔✔Stomata closes, preventing CO2 from entering the leaf
If _P = 0.3 MPa and _S = -0.45 MPa, the resulting _ 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
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
Questions and Corresponding Answers
with Surety of 100% Pass Mark
Slows cell growth often antagonizing the action of other hormones -
🧠ANSWER ✔✔Abscisic Acid
release from embryo signals seeds to break dormancy and germinate -
🧠ANSWER ✔✔Gibberellins
accumulates in leaves when plant begins to wilt, causing stomata to close
rapidly - 🧠ANSWER ✔✔Abscisic Acid
synthetic forms of this hormone are widely employed as herbicides that
target broad leaf weeds such a dandelions - 🧠ANSWER ✔✔Auxins
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
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,Transcriptional regulation and post-transcriptional 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
In the figure below right, the cells in the region enclosed by the middle part
of a stem constitute the - 🧠ANSWER ✔✔Zone of elongation
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. How tall is
the nail above the ground? - 🧠ANSWER ✔✔1.5 meters
Based on the ABC model, what would be the structure of a flower that had
normal expression of genes A and B but lacked expression of gene C? -
🧠ANSWER ✔✔Sepal-petal-petal-sepal
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, 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 that George left functional was the -
🧠ANSWER ✔✔Xylem
This root structure ensures that all water and dissolved substances must
pass through a cell membrane before entering the stele (vascular cylinder)
- 🧠ANSWER ✔✔Casparian strip
Photosynthesis ceases when leaves wilt, mainly becuase - 🧠ANSWER
✔✔Stomata closes, preventing CO2 from entering the leaf
If _P = 0.3 MPa and _S = -0.45 MPa, the resulting _ 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
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
