BI 113 General Biology II

1
BI 113 General Biology II

• Discussion
• Session 8

2
Plant physiology

• Low intracellular pressure in plant cells results
  when
• A) cells have lower water potential
• B) extracellular fluid pressure is higher
• C) tugor pressure is low
• D) both B and C
• E) all of the above

3
Plant physiology

• The rate of photosynthesis in plants is a
  function of
• A) humidity
• B) light intensity
• C) stomatal opening/closing
• D) both B and C
• E) all of the above

4
Plant physiology

• Transport of photosynthate (primarily sugars)
  from the leaves to storage structures is
  accomplished specifically by
• A) companion cells
• B) pallisade mesophyll
• C) sieve tubes
• D) tracheids
• E) xylem

5
Plant respiration
6
Water uptake in dicot roots
7
Flowering plant movements

• Plant movements that occur in response to touch
  are called
• A) gravitropic
• B) magnetotropic
• C) photoperiodic
• D) phototropic
• E) thigmotropic

8
Flowering plants

• Shoots of young plants grow towards light
  because
• A) auxins become concentrated on the shaded side
  of the shoot
• B) auxins stimulate cellular division
• C) auxins stimulate cellular elongation
• D) gibberellins signal for the production of
  hydrolytic enzymes
• E) both A and C

9
Flowering plants

• Male reproductive structures in flowering plants
  include the
• A) anther
• B) apical meristem
• C) ovary
• D) petals
• E) stigma

10
Sex parts of flowering plants
11
Carpels