Plant Development: Angiosperms Flashcards
How many essential elements do plants require?
17
Define essential element
A chemical that is required for a plant to complete its life cycle
Define macronutrients
essential elements required by plants in relatively large quantities
How many macronutrients are there?
9
What are the 6 macronutrients and what is their main collective function?
- C
- H
- O
- N
- S
- P
They are major components of organic compounds that form the plant structure
What are the other 3 macronutrients?
- Ca
- K
- Mg
List the 9 macronutrients
- C
- H
- O
- N
- P
- S
- Ca
- Mg
- K
Define micronutrients
essential elements required by plants in relatively small quantities
What are the 8 micronutrients?
- Cl
- Fe
- Mn
- B
- Zn
- Cu
- Ni
- Mo
T or F: plant life cycles have alternation of generations of 1 unicellular stage and 1 multicellular stage
FALSE.
Life cycles have alternations of generations between 2 multicellular stages
What are the two generations of life cycles?
Haploid gametophyte
Diploid sporophyte
Is the sporophyte generation haploid or diploid?
Diploid
Is the gametophyte generation haploid or diploid?
Haploid
What does the sporophyte stage produce? And through which process?
Diploid sporophyte produces SPORES by MEIOSIS
Are spores diploid or haploid? Explain
Haploid because they are produced when diploid sporophytes undergo meiosis
Meiosis = one 2n cell –> four 1n cells
By which process do spores grow? And what will they turn into?
Haploid spores grow by MITOSIS into the MULTICELLULAR GAMETOPHYTE
Why does the gametophyte have the ploidy it has?
The HAPLOID gametophyte is produced when the haploid spores undergo mitosis.
Mitosis = one 1n cell –> two 1n cells
So the gametophyte must be haploid
What does the gametophyte produce and by which process?
Produces gametes by mitosis
What ploidy do gametes have? Explain
they are haploid because they are produced by the haploid gametophyte which undergoes mitosis
What forms when two gametes fuse together?
A unicellular, diploid zygote
What ploidy will the zygote have?
Diploid
because two 1n cells fuse = 2n
By which process will the zygote grow? What will it become?
Diploid zygote grows by mitosis to become the diploid sporophyte
Why does the sporophyte have the ploidy it has?
The sporophyte is diploid because it develops from the DIPLOID zygote undergoing mitosis
Mitosis = one 2n cell –> two 2n cells
Which stage is dominant in angiosperms?
The diploid sporophyte stage