food chains and carnivorous plants TA.notebook
1
April 05, 2016
Jun 1808:51
second side of worksheet 2Finish from last week.
Jun 1808:51
poisons, disease, natural disasters, destruction of habitat prey
the food availability for the prey is very high while availability
for the predator only rises over time.
Food chains and energy work sheet and questions on both sides finish for homework.
Mrz 809:01
Predator / prey relationships.
We are learning:
Terms: Carnivore, herbivore, omnivore, consumer, producer, predator, prey, trophic level, food chain, food web.
To draw food chains, food webs, a pyramid of numbers and a pyramid of biomass.
To describe how plants can be carnivorous.
To use Darwin's size of prey hypothesis to explain carnivorous plant behaviour.
Mrz 810:27
Mrz 810:27 Mrz 810:28
food chains and carnivorous plants TA.notebook
2
April 05, 2016
Mrz 810:28 Mrz 810:28
Mrz 809:32
Carnivorous plants.
Sarracenia (Pitcher Plant)
Dionaea (Venus Flytrap)
Drosera (Sundew)
This sticky fly paper trap has hair glands which produce digestive juices to decompose trapped prey. The proteases and phosphatases increase in production once a prey has been captured.
Pitcher plants
have modified
leaves known
as pitfall traps
filled with
digestive liquid
The venus fly trap will snap shut if the hairs are moved within 20 seconds of each other. The trap will not fully close in the beginning to allow smaller insects to escape, but the larger insects / arachnids will get trapped by the hairs. Any part of the insect spilling out of the trap will get destroyed by bacteria and fall away.
Make notes on your diagram to explain the functioning of each carnivorous plant.
Mrz 809:42
Using Darwin's size of prey hypothesis, explain why the Venus fly trap only closes half way in the beginning of the digestive process.
Work sheet.
Task 1
Task 2
Explain as fully as you can why the numbers of organisms decrease as you go along a food chain.
Task 3
Mrz 813:12
