Lab 7

Question 1

Are gymnosperms homosporous?

Answer 1

No, gymnosperms and angiosperms are heterosporous.

Question 2

What consists of the megasporangiate strobilus and the microsporangiate strobilus?

Answer 2

The megasporangiate strobilus is the seed cone that produce ovules which develop into seeds after pollination.

The microsporangiate produces pollen grains and is composed of microsporophylls that bear microsporangia

Question 3

Tsuga heterophylla

Answer 3

Western hemlock: the tip of the tree droops, needles are short & flat, needles vary in length

Question 4

Thuja plicata

Answer 4

Red cedar; cones are small and oval and woody when mature, leaves are blunt tipped and arranged in pairs

Question 5

Callitropsis nootkatensis

Answer 5

Yellow cedar; cones are round, leaves are sharp-tipped

Question 6

Picea

Answer 6

Spruce; needles are stiff, pointed and prickly, cones are thin and papery

Question 7

Abies

Answer 7

Fir; cones erect, scales usually deciduous (shed seasonally)