Plantastic

By: Oliver Homann-5th Period

Dichotomous Key

1a- Leaves are large......................................................................................Go to 2

1b- Leaves are small.....................................................................................Go to 3


2a- Petals are small and semi-circular........................................................Lavender

2b- Petals are large and not circular...........................................................Go to 4


3a- Petals cover almost the entire stem and are small............................Mexican Heather

3b- Petals dispersed on the stems and aren't extremely noticeable.....Rosemary


4a- Leaves edges appear smooth and are oval-like..................................Dianthus

4b- Leaves edges appear jagged..................................................................Go to 5


5a- Petals are White.......................................................................................Dwarf Daisy

5b- Petals are Red/Pink..................................................................................Gerbera Daisy


The Dichotomous Key pictures were taken by Oliver Homann

Tropisms

Hydrotropism- roots growth towards water

Positive Taxis Example- a trees roots grow towards a river

Negative Taxis Example- all plant roots show a positive taxis to water


Phototropism- plant growth due to light

Positive Taxis Example- a maple tree's shoot system grows up towards sunlight

Negative Taxis Example- a maple tree's root system grows down away from sunlight


Geotropsim- plant growth due to gravity

Positive Taxis Example- a rose's root system grows down towards gravity

Negative Taxis Example- a rose's shoot system grows up away from gravity


Thigmotropism- plant growth due to touch

Positive Taxis Example- vines grow up a wall

Negative Taxis Example- a sunflower grows and touches a wall and then starts growing away from the wall


The following pictures are from the http://padlet.com/jfamigletti/cvf8okzueb32

Plants and Forces

Turgor pressure is the water pressure within a cell. The water exerts force on the cell keeping it supported. When turgor pressure is too low in plant cells, the plant will wilt.


Root Wedging occurs when roots of a plant (normally tree roots) sink into and exert force on rocks and other solid objects. The roots eventually will break what ever solid they are growing into.


Geotropism causes a plant to grow due to the force of gravity

Other Plant Information

Plants are autotrophic meaning they create their own food. They undergo a process called photosynthesis. The formula for photosynthesis is

Water+Carbon Dioxide+Sunlight=Glucose+Oxygen. They have a very unique organelle called chloroplast that allows them to absorb and use sunlight for photosynthesis. Chloroplasts also make plants green. In addition to chloroplasts plants have a cell wall, which gives a plant support and a large central vacuole which stores large amounts of water.