Seedless Plants
Why is a rhizoid not considered a true root
Rhizoids lack xylem tissue
How do lycophytes differ from bryophytes?
Lycophytes have tracheids
What is the purpose of a petal
to attract a pollinator
Based on the number of species, the most successful extant phylum of plants is the
Anthophyta
Which of these insectivorous plants does not use an active trapping mechanism?
pitcher plants
What is a 15 meter tall tree fern?
A sporophyte
In tracheophyte plants, water and dissolved minerals are conducted away from roots by
xylem tubes
Pollen comes from the
anthrax
Why can corn seeds germinate in total darkness?
The endosperm provides the embryo with the nutrition needed during the initial germination stages.
When legumes with nitrogen-fixation nodules are given chemical fertilizers with high nitrogen concentrations, they abandon support of the nodules and end the symbiosis. Why?
The plant can conserve valuable energy sources by terminating the symbiotic relationship.
What is a feature common to moss leaves and true leaves
chlorophyll a and b
Plants as well as brown, green, and red algae show a basic life cycle which involves the alternation of generations between a(n)
sporophyte and a gametophyte
Why is external water not essential for fertilization in seed plants?
Pollen grains are transported by wind or an animal.
From what are fruits derived?
ovaries
During the initiation of nitrogen-fixation nodules, how do the Rhizobium bacteria enter into the cortex of the root?
through a membrane tube called an infection thread
Which plants are characterized by a conducting system, the possession of cuticles, specialized stems, and roots, stomata, and, in many species, seeds?
tracheophytes
The gametophyte is green and nutritionally independent in
mosses, liverworts and ferns
Which part of the seed is responsible for providing nutrition to the embryo?
endosperm
fruit
Which of the following is required by plants in the smallest quantity?
boron
The most abundant group of seedless tracheophyte plants are the
ferns
(seed plant questions) Double fertilization occurs when
one sperm fuses with the egg and the other sperm fuses with both polar nuclei.
Why aren't ferns commonly found in deserts?
Fern spores are unable to resist prolonged dry conditions.
Inside nitrogen-fixing nodules, one N2 molecule is converted into two
NH3
Which of the following is most limiting for plant growth, especially in relation to the plant's carbon uptake?
nitrogen