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FLowering and Phytochrome Flashcards | StudBud

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FLowering and Phytochrome

10 terms·StudBud Administration·411 plays

Biology, NZ, Year13, Plant responses, photoperiodism

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Questions 10

Answers

1
When will flowering occur?
When surrounding plants trigger more flowering
When Pfr:Pr conc reaches critical day length amount
when plant reaches its full height
When clock genes produce florigen
2
What do we call the genes involved in producing florigen at critical day length?
florigen
flower genes
phytochromosomes
clock genes
3
Which of the following is a SHORT DAY plant?
one that flowers when day is less than 10.5 hours
one that flowers when night is greater than 12.5h
one that flowers when day is greater than 14h
one that flowers when night is less than 11 hours
4
How do plants measure night length?
Pr rapidly converted to Pfr
florigen concentration
they detect concentration of Pfr:Pr
they use a watch
5
Why did this shoot grow (bend) towards the left?
auxin levels where even on both sides
auxin built up on the lighter side
auxin built up on the darker side
auxin built up in the root tips
6
HOW do plants determine when to flower?
by measuring daylight using clock genes
by measuring night length
by measuring night length using florigen
by measuring day length
7
Which of these is a growth HORMONE?
florigen
auxin
ethylene
chlorophyll
8
which of these is a PIGMENT?
florigen
ethylene
phytochrome
auxin
9
A stem has even concentrations of auxin on both sides. It will...
bend towards the light
grow straight upwards
stop growing
grow straight downwards
10
Why is it important for plants of the same species to flower together?
to increase chances of cross-pollination and variation
to reduce variation/genetic diversity within the species
to reduce damage from weather
to encourage self-fertilisation