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IB Bio Plant Physiology > plant reproduction > Flashcards

Flashcards in plant reproduction Deck (13)
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1
Q

Sepals

A

Protect the developing flower while it’s inside the bud

2
Q

Petals

A

Often colourful to attract pollinators

3
Q

Anther

A

art of the stamen that produces the male sex cells

4
Q

Filament

A

Stalk of the stamen that holds up the anther

5
Q

Stigma

A

Sticky top of the carpel where pollen lands

6
Q

Style

A

Structure of carpel that supports stigma

7
Q

Ovary

A

Base of carpel, where the female sex cells develop and fertilization occurs

8
Q

Pollination

A

the act of transferring pollen grains from the male anther of a flower to the female stigma
Male pollen carried by pollinators or wind to style
Most flowering plants have a mutualistic relationship with pollinators in sexual reproduction (reward pollinators with nectar)

9
Q

How do plants attract pollinators?

A

Bright colors, scent
Food
Pollinators can be generalist or specialist (generally specialist pollinators are crossed with generalist plants and vice versa)

10
Q

Types of pollination:

A

Self pollination: a pollen from the anther of the same plant falls upon its stigma (inbreeding + less variation)

Cross pollination: pollen carried from anther of one plant to a stigma of different plants of same species (increases variation)

11
Q

Fertilization

A

when the male and female sex cells unite in the ovule to form a diploid zygote
When pollen grain adheres to stigma (covered in sticky substance) it grows a pollen tube

12
Q

Fertilization process

A

Pollen germinates to produce pollen tube

Pollen tube grows down style

Within the growing pollen tube is the nucleus that will produce sperm

The pollen tube completes its growth and enters an opening at the bottom of the ovary

The sperm moves from the tube to combine with egg in ovule and form a zygote

Zygote develops into seed

13
Q

Seed Dispersal

A

the method by which seeds are scattered from plant to a new place where they can grow and develop into a new plant
Wind, water or animals can disperse seeds