4.2- Sexual Reproduction in Plants Flashcards
What is an angiosperm?
A flowering plant
Angiosperms are pollinated by______ and_______
•wind
•insects
Describe some differences between insect pollinated and wind pollinated plants?
• Insect pollinated have: bright colours and a scent
•wind pollinated have: no colour (or are green) and no scent
Describe the features of insect pollinated flowers
Look at diagram and label
Describe the features of wind pollinated flowers
Look at diagram and label
What is the structure & function of the sepal?
•structure: OUTERMOST ring of petals
•function: protects developing bud
What is the structure & function of the petals?
•structure: colourful structures (collectively called corolla)
•function: attract insects for pollination
What is the structure & function of the filament?
•structure: stalk structure that is the LOWER part of the STAMEN
•function: supports anther, transports water, mineral ions & sucrose required for pollen formation
What is the structure & function of the anther?
•structure: UPPER part of the STAMEN ( contains 4 pollen sacs)
•function: pollen sacs dehisce here (open) and release pollen
What is the structure & function of the stigma?
•structure: sticky platform at TOP of CARPEL
•function: receives pollen during pollination
What is the structure & function of the style?
•structure: connects STIGMA and OVARY
•function:male gametes pass down style via pollen tube nucleus
What is the structure & function of the ovary?
•structure:LOWER part of the carpel (surrounds the ovule → contains embryo sac)
•function: contains ovule & develops into a fruit.
What are the male structures of the plant ( make up the stamen)
•anther
•filament
What are the female structures of the plant (make up the carpel)?
•stigma
•style
•ovary
•ovule
Pollen grains contain the ______ gamete and are formed ______ the pollen sacs
•male
•inside
