Flashcards in Plant Evolution And Adaptation Deck (31):
How do scientist describe plants?
Multicellular eukaryotes with tissues and organs with specific functions.
How many years old is earth?
4.6 billion years ago
How many years ago does the primitive land plants first appeared?
400 million years ago
What does fossil evidence indicates?
That 500 mya, Earth’s shallow waters had algae, bacteria, and protists.
Which are the characteristics of the green algae?
• Is photosynthetic
• Is a freshwater eukaryote.
• Contains clorophyll
Which are the adaptations that plants developed to survive terrestrial environments?
Cuticle, Stomata, Vascular tissues, and Seeds.
What is the cuticle?
Is a waxy coat on the outer surface of plant cells.
What is the cuticles purpose?
What are the stomata?
Small openings or pores that allow gas exchange.
What does photosynthesis creates?
Glucose and oxygen.
What are vascular tissues?
Are specialized transport tissues that transport substances into and out of cells, but also moves substances from cell to cell
A characteristic of vascular plants:
Usually are larger than nonvascular plants
A characteristic of nonvascular plants:
Lack transport tissues, and they move water from cell to cell using diffusion and osmosis
Examples of vascular plants:
• Flowering plants
Examples of nonvascular plants:
What does the plants produce in order to reproduce:
Spores or seeds.
What are spores?
Are how nonseeded plants reproduce.
What do seeds contain?
Contain an embryo and nutrients to feed that embryo.
How many stages does the plants cycle has?
Which are those two stages?
Gametophyte and sporophyte
What does gametophytes produce?
Which are the two gametes and for who?
Sperms, for male and eggs, for female.
What are haploid cells?
Have half the number of chromosomes-DNA in the form of genes. Also gametes are haploid cells.
What does sporophytes produce?
What are zygotes?
• Is the very first cell that’s a combination of the parents’ DNA (of two gametes)
Which generation is most common in vascular plants and which one in nonvascular plants?
The sporophytes are most common on the vascular plants, and the gametophytes are most common in nonvascular plants.
How do plants divide?
Vascular and nonvascular
How does the vascular plants divide?
Seeded and nonseeded.
Which are the types of nonseeded plants?
Lycophytes (Club Mosses), and Pterophytes (Horsetail, ferns)
Which are the types of seed producing plants?
Cycadophytes (Cycads), Gnetophytes (Joint firs), Ginkgoephytes (Ginkgoes), Coniferophytes (Pines), Antophytes (Flowering plants)