15.6 Phylum Lycophyta: Club Mosses 13. Both Lyopauliam and Equisetum have strobi

Question

15.6 Phylum Lycophyta: Club Mosses 13. Both Lyopauliam and Equisetum have strobill, roots, and thizomes. What did you learn in this exercise tha enables you to distinguish these two plants? Examine the photo at the right. a. Give the genus of this plant. b. Label the structure indicated. 14. Some species of Lycopodinm produce gametophytes that grow beneath the surface of the soil, while oth- ers grow on the soil surface. what you've learned from other plants in this exer- cise, predict how each respective type of Lacopadionm gametophyte might obtain its nutritional needs Basing your answer on (03%). 15.7 Phylum Moniliophyta, Subphylum Psilophyta: Whisk Ferns 15. Using a biological or scientific dictionary, or a reference in your textbook, determine the meaning of the root 15.8 Phylum Moniliophyta, Subphylum Sphenophyta word psilo, and relate it to the appearance of Psilotum Horsetails 16. Examine the photo on the right. You studied this genus in lab, but this is a different species. This species has two separate stems produced at dif- ferent times in the growing season. The stem on the left is a reproductive branch, while that on the right is strictly vegetative. Based on the charac- teristics obvious in this photo, identify the plant, give its scientific name, and then identify the labeled structures. Scientific name (0.75x). 292 EXERCise 15

Explanation / Answer

13 ) a) Genus lycopodium

b) the structure is strobilus

14) lycopodium is homosporus. ie spore germinates to produce gametophytic prothallus which has both male and female sex organs.The gametophyte depends on fungus for its nutritional requirements.

15) psilos means bare,smooth or bald.

Psilotum sp genus are smallvascular plants with unusual plant organs .they lack true roots and stemsare smooth and contain structures that act as leaves.

16) Equisetum arvense

A - Strobilus

B-leaves

C - node

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