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IB Biology HL 2 Semester One Final Exam Test Study Set questions with correct answers
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IB Biology HL 2 Semester One FinalExam Test Study Set questions with
correct answers
How are fluids transported in the xylem and the phloem?
A: Away from the root only (xylem) towards the root only (phloem)
B: Towards the root only (xylem) Away from the root only (phloem)
C: Away from and towards the root (xylem) Towards the root only (phloem)
D: Away from the root only (xylem) Away from and towards the root (phloem)
- .......🔷ANSWERS🔶......✔✔ D
What controls the flowering process in long-day plants?
a. Pfr is converted by red light to Pr which acts as an inhibitor of flowering.
b. Pr is converted by red light to Pfr which acts as a promoter of flowering.
c. Pr is converted by red light to Pfr which acts as an inhibitor of flowering.
d. Pfr is converted by red light to Pr which acts as a promoter of flowering.
- .......🔷ANSWERS🔶......✔✔ B
When a plant is transpiring, water rises up in the xylem vessels from the roots to the leaves. This flow
of water is called the transpiration stream. What property of water is essential for the transpiration
stream to happen?
a. When water evaporates it removes heat and therefore causes cooling.
b. Water is a good solvent so inorganic particles can be carried up in the transpiration stream.
c. Water molecules are cohesive and therefore can be pulled up.
d. Water has a high specific heat capacity. - .......🔷ANSWERS🔶......✔✔ C
, What prevents a long day plant from flowering in winter?
a. Too little Pr is converted to Pfr at night
b. Too little Pr is converted to Pfr during the day
c. Too much Pfr is converted to Pr during the day
d. Too much Pfr is converted to Pr at night - .......🔷ANSWERS🔶......✔✔ D
How do mineral ions in the soil move to the root through the soil? Select all that apply.
I. Mass flow of water
II. Translocation
III. Facilitated diffusion
IV. Active transport
a. II & III
b. I, III, & IV
c. III & IV
d. I only - .......🔷ANSWERS🔶......✔✔ B
What is the effect of abscisic acid on transpiration?
a. It decreases transpiration by increasing the humidity inside the leaf.
b. It increases transpiration by decreasing the humidity inside the leaf.
c. It decreases transpiration by causing the stomata to close.
d. It increases transpiration by causing the stomata to open. - .......🔷ANSWERS🔶......✔✔ C
What is the advantage of CAM (crassulacean acid metabolism) and other adaptations of xerophytes
in plants?
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