Worksheets3.1 Review Pd 3
Total questions: 17
Worksheet time: 15mins
What is a pioneer species?
First life forms to ever exist
Organisms that make their own food
The first organisms to colonize a barren area
Organisms that live in extreme conditions
What makes pioneer species so important?
They help create soil by secreting acids that break down rocks, and when they die, their decaying matter mixes with sediment
They form the basis of the food chain, as they are consumers who are eaten by other animals
They help plants grow by doing nitrogen fixation
They help lichens form by creating soil, which the lichens feed on and multiply until they evolve over time
Which of these is an example of a pioneer species?
Lichen
Small birds
Squirrel
Tree
This is a description of (a) (primary or secondary) succession:
Establishment of a community in a barren area with no topsoil present.
This is a description of (a) (primary or secondary) succession:
Orderly change in a place where soil remains after a community of organisms are removed
This is a picture of which type of succession?
Primary
Secondary
This is a picture of which type of succession?
Primary
Secondary
What is the main thing that sets the two types of succession apart? (read carefully)
primary succession starts with a layer of topsoil and secondary succession does not
primary succession does not have a climax community at the end, but secondary succession does
primary succession begins with bare rock, and secondary succession has a layer of topsoil
secondary succession does not have a climax community at the end, but primary succession does
What is a climax community?
all of the biotic and abiotic factors in an area
community with a large amount of change in number of species
mature community that was destroyed by a natural disaster
mature community with little change in the number and composition of species
True or False:
Soil is created when pioneer species secrete acids which break down rock. Then, when they die, their decaying matter mixes with the sediment to create soil
True
False
A is the ____________.
Optimum zone
Zone of Physiological Stress
Zone of Intolerance
B is the _____________
Optimum Zone
Zone of Physiological Stress
Zone of Intolerance
D is the ________________
Optimum Zone
Zone of Physiological Stress
Zone of Intolerance
A (a) is a group of interacting populations that occupy the same area at the same time.
A (a) factor is any biotic or abiotic factor that that restricts the numbers, reproduction, or distribution of organisms.
Which of the following is an example of a BIOTIC limiting factor?
other animals
sunlight
water
nutrients
Which of the following is an ABIOTIC limiting factor?
animals
plants
fungi
soil acidity
