Plant Processes
Practice Test
1.
You duck your head when a baseball is thrown toward your face. You are responding to __________.
a.
an external stimulus
b.
pigments
c.
hormones
d.
an internal stimulus
Hint
2.
The outer layer of a leaf is called the __________.
a.
seed
b.
epidermis
c.
muscle
d.
trunk
Hint
3.
You are traveling in Costa Rica and see many lettuce plants growing in fields. You conclude that lettuce is __________.
a.
a perennial plant
b.
a nonvascular plant
c.
a short-day plant
d.
a long-day plant
Hint
4.
Spinach is a plant that needs short nights to flower. It is a __________ plant.
a.
day-neutral
b.
short-day
c.
nonvascular
d.
long-day
Hint
5.
Carbon dioxide is involved in __________.
a.
photoperiods
b.
thigmotropism
c.
light-independent reactions
d.
light-dependent reactions
Hint
6.
Plant photosynthesis helps humans because __________.
a.
the process adds nitrogen to the atmosphere
b.
the process adds carbon dioxide to the atmosphere
c.
the process adds oxygen to the atmosphere
d.
the process removes oxygen from the atmosphere
Hint
7.
A plant's response to touch is called __________.
a.
light-independence
b.
photoperiodism
c.
respiration
d.
thigmotropism
Hint
8.
When a plant is losing too much water, it can __________ its stomata.
a.
multiply
b.
close
c.
dissolve
d.
open
Hint
9.
Carbon dioxide enters a plant through its __________.
a.
leaves
b.
trunk
c.
flowers
d.
roots
Hint
10.
Respiration is important to most organisms because __________.
a.
oxygen is removed from the atmosphere
b.
food energy is converted into a form for cell use
c.
carbon dioxide is removed from the atmosphere
d.
it is an external stimulant
Hint
11.
Which of these is NOT a hormone that affects plant growth?
a.
ethylene
b.
mitochondrion
c.
auxin
d.
cytokinins
Hint
12.
A vine growing up the wall outside your classroom is an example of a response to __________.
a.
aerobic respiration
b.
positive phototropism
c.
thigmotropism
d.
negative gravitropism
Hint
13.
You are outside admiring the flowers on a rose bush. Looking at the green leaves, the green light is __________ from chlorophyll.
a.
filtered
b.
mutated
c.
dissolved
d.
reflected
Hint
14.
The hormone that helps plants conserve water is __________.
a.
hydrochloric acid
b.
ascorbic acid
c.
abscisic acid
d.
antacid
Hint
15.
The hormone that promotes faster cell division in plants is called __________.
a.
chloroplasts
b.
tropism
c.
stomata
d.
cytokinins
Hint
16.
Small openings on the epidermis of plant leaves are called __________.
a.
stomata
b.
waste
c.
bark
d.
vapor
Hint
17.
Auxin is a hormone that causes plants to respond to __________.
a.
negative gravitropism
b.
positive phototropism
c.
negative phototropism
d.
positive gravitropism
Hint
18.
Aerobic respiration takes place in which organelle?
a.
cell wall
b.
mitochondrion
c.
endoplasmic reticulum
d.
nucleus
Hint
19.
Chlorophyll and other pigments are involved in __________.
a.
light-independent reactions
b.
gravitropism
c.
light-dependent reactions
d.
respiration
Hint
20.
Positive phototropism can cause plant leaves to change growing patterns and __________.
a.
grow towards a touch stimulus
b.
stop making new cells
c.
grow towards a light source
d.
become day-neutral plants
Hint
