- A pine tree is an example of what stage of the gymnosperm plant?
- What tissue is at the very center of a young pine stem?
- The annual rings are formed from what tissue?
- Distinguish between spring wood and summer wood.
Springwood is that part of annual ring of wood which consists of large, thin-walled cells that are produced during the first part of budding season while, Summerwood is another fraction of annual ring that contains compact, thick-walled cells which are designed during the later part of the growing season.
- In the outer portion of the twig, the outermost layer is _ cork _ and the inner bark is phloem.
- All plants have the sexual cycle that alternates a diploid sporophytic generation and haploid gametophytic generation. The sporophyte forms spores by meiosis the gametophyte forms gametes by mitosis.
- In mosses, the _ gametophyte __ is dominant (or predominant). In ferns and all other vascular plants, the _ sporophyte __ is predominant.
- In ferns (and other “seedless vascular plants”), the gametophyte is a free-living, autotrophic organism.
- While the fern sporophtye is well adapted to land, the fern gametophyte is not.
- In the alternation of generations, the diploid phase produces spores and is, therefore, called the sporophyte. The haploid phase produces gametes and is, therefore, called the gametophyte.
- What type of cells is formed in a moss antheridium?
- What type of cells is formed in a moss archegonium?
- A live fern leaf (frond) may have brown or black specks called “sori” on the underside. The small brown or black cells are spores that, under the correct conditions, will germinate to form the gametophyte generation.
- What tissue transports nutrients and food throughout the tree?
- What is the substance that leaks from the cut ends of twigs and acts as a defense mechanism?
Resin leaks from the cut ends of twigs and acts as a defense mechanism.