Fall 2007
Botany Lab 11 – Gymnosperms
(Use Exercise 27 in your Lab book)
All of the below divisions are gymnosperms
Division Coniferophya (Pinophyta) – Conifers (Pine, fir, spruce, hemlock, redwood, cedar,
Division Ginkgophyta – the ginkgo tree
cypress, yew)
Division Cycadophyta – Cycads
Division Gnetophyta – Gnetum, Welwitchsia, Ephedra
GYMNOSPERMS – Gymnosperms have naked seeds different than angiosperms which have covered
seeds.
– Like angiosperms, gymnosperms have vascular tissues and has a sporic life cycle
(alternating sporophyte and gametophyte bodies).
-----------------------------------------------------------------------------------------------------------------------------Read Pages 293 and 294.
Do Activity 2. Skip first paragraph and the part about making a slide. You will only be using prepared
slides for this section. Use these Slides “Pinus Staminate Cone L.S.” or “Pinus Staminate Cone”
Do Activity 3 – Use these Slides “ Pinus Ovulate Cone” Pinus Ovule, Mature Archegonium L.S.”
Use Branch As Well.
Skip Activity 4
Do Activity 5 with the cones. Be very careful with the large cone.
Draw pictures of each represented cone.
Skip Activity 6
THE BELOW ACTIVITIES ARE NOT IN YOUR BOOK.
Activity 7 – Investigate the Slides and draw pictures of one of the following slides.
“Pinus (Male Cone Cluster)” “Pinus (Female Cone, General Structure)” “Pine Cones”
Activity 8 – Investigate specimens and draw and write what the specimen is.
Activity 9 – Determine the density of each of the following pieces of wood.
You can use a scale and beaker. Density = mass / volume. Use the following units: g/ml
Wood Type
Density (Use Units)
Which has greater density, angiosperms
or gymnosperms? Why? What is going
on in the wood?
When we are talking about softwoods,
what type of wood is this? Why?
Do questions on page 299.
--------------------------------------------------------------------------------What do you need to turn in? This sheet, your drawings
Questions on page 297 and 299
1
This workforce solution was funded by a grant awarded under the President’s Community-Based
Job Training Grants as implemented by the U.S. Department of Labor’s Employment and Training
Administration. The solution was created by the grantee and does not necessarily reflect the official
position of the U.S. Department of Labor. The Department of Labor makes no guarantees,
warranties, or assurances of any kind, express or implied, with respect to such information,
including any information on linked sites and including, but not limited to, accuracy of the
information or its completeness, timeliness, usefulness, adequacy, continued availability, or
ownership. This solution is copyrighted by the institution that created it. Internal use by an
organization and/or personal use by an individual for non-commercial purposes is permissible. All
other uses require the prior authorization of the copyright owner.
2