Flashcards in Chapter 21 Deck (23):
Biologists describe plants as:
Multicellular eukaryotes with tissues and organs.
Earth is ______________ years old (bya)
One characteristic of green algae:
It is photosynthetic (optional)
• Land plants developed adaptations to survive terrestrial environments: (examples)
• vascular tissues
Is a waxy coating on the outer surface of plant cells.
Are small openings/pores that allow gas exchange.
They are specialized transport tissues, and move substances into and out of cells. (also from cell to cell)
They are usually larger and taller than nonvascular plants.
They lack transport tissues, move water from cell to cell using diffusion and osmosis.
Examples of vascular plants:
Trees, grasses, ferns, flowering plants.
Examples of nonvascular plants:
Mosses, liveworts, hornworts.
Plants produce _______ or ________ in order to reproduce.
Spores and seeds.
They contain a single cell capable of producing and organism.
They contain an embryo and nutrients to feed that embryo, and are covered with a protective layer.
An alternation of generations-two stages (two generations), the gametophyte and sporophyte generation.
It is a generation that produces gametes (sperm and eggs).
What are the haploid cells?
Have half the number of chromosomes-DNA in the form of genes.
• when a sperm fertilizes an egg, a _______ is formed.
Is the very first cell that’s a combination pf the parents’ DNA of two gametes’.
A zygote forms a:
Sporopyte Generation (2n).
(mosses, hornworts, liveworts)
Bryophytes, Anthocerophytes, Hepaticophytes.
(club mosses, ferns and horsetails)