Second exam (VERSION 3)
11 March 2008
Select the BEST answer or phrase for the following questions.
This exam has 50 questions.
questions and possible answers carefully.
Read all choices before selecting the "best" one.
When you admire the “flowers” of dogwood or poinsettia, the colorful part is
b. the petals
e. floral leaves or floral bracts
The yellow color of a carrot results from a pigment that occurs in what part of the cells?
in cell walls
in the nucleus
in the cytoplasm
How many leaves are shown in the drawing???
A plant hormone that stimulates fruit ripening and is a gas is
Which treatment increases
the free energy of water molecules in a plant cell?
increase turgor pressure
decrease cell temperature
promise the water molecules a trip to the store
increase concentration of sugars
decrease turgor pressure
6. The embryo sac of angiosperms consists of ___ cells and ___ nuclei that are ___.
a. 8, 8, haploid
b. 4, 4, diploid
c. 2, 2, diploid
d. 7, 8, triploid
e. 7, 8, haploid
Nearly all of the paper in North America is made from what group of plants?
8. How many of the nuclei in a pollen tube actually fuse with nuclei in the embryo sac?
Phototropism involves which 3 items listed below?
a. light, gravity, ethylene
b. light, auxin, cell elongation
c. light, auxin, cell shrinkage
d. gravity, cytokinin, mitosis
e. ethylene, light, mitosis
In a leaf, the layer of cells just below the upper epidermis is the
b. palisade mesophyll
c. spongy mesophyll
In a plant, photosynthesis occurs in __ and respiration occurs in ___.
all of the green cells, all of the live cells that are not green
all of the green cells, all of the live cells
all of the live cells, all of the live cells
all of the live cells, all of the dead cells and live cells
all of the live cells that are not underground, all of the cells underground