WorksheetsChapter 17: Gymnosperms
Total questions: 10
Worksheet time: 5mins
cedar:
Cones look like miniature wooden roses. Modified needles that look like beads of wax melted. Rot resistant, with a cedar smell.
Conifers like the spruce, cedar and pine tree are gymnosperms and have seeds on cones.
Most coniferous trees are evergreen and are specially adapted to survive in areas with lots of snow.
Fir
needles attached directly to the twig. When they drop, they leave behind a slightly raised, circular pad.
Gymnosperms usually have needles that stay green throughout the year.
Gymnosperms include most evergreen species such as pines, spruces and firs.
pines
needles appear in clusters of 2, 3, or 5. These clusters are called fascicles. Not tolerant of shade (need sunlight).
gymnosperms are a taxonomic class that includes plants whose seeds are not enclosed in an ovule (like a pine cone).
That is because, unlike a flowering plant, the seeds of pine trees are not inside a protective, fleshy fruit.
how much time it takes for a conifer to achieve fertilization from the time of pollination (how long can it take from the time of pollination to the time of fertilization
A year
two years
three years
the approximate number of species that each of the gymnosperm groups has Ginkophyta
just 1 specie
about 820 species.
two species
Know the approximate number of species that each of the gymnosperm groups has Gnetophyta
Ephedra- 40 species
conifers- 50 species
single living
Know the approximate number of species that each of the gymnosperm groups has Coniferphyta
50 genera, 550 species.
40 species
680 species
the approximate number of species that each of the gymnosperm groups has cycadophyta
100 species
150 species
200 species
Differentiating firs, cedars, and pines in our slide show
On the spruce, each leaf has two white bands where the stomata occur
The needles on pine trees tend to be softer and not as thick and pointy as the needles on cedar trees.
If the needles are longer and easily bendable when you touch them, that means it is most likely a pine tree.
Pollen cone:
pollen contains sperm. In the springtime, you find yellow dust on your car hood. A lot of this is pine pollen. Pine pollen is wind-blown (insects don’t do the pollination).
ine pollen cones are the male fruiting body of a pine tree.
the pollen cones are small, typically half an inch in size with a typical conical shape.
