Biology Forums - Study Force

1.Choose the correct defense mechanism from the drop down menu that match the following examples. A defense mechanism can be used more than once.
- Behavioural Defence
-Crypric colouration
-Protective Coloration
-Mimicry
Examples:

A walking stick insect blends into the twigs in its habitat:
A defenseless organism looks like a poisonous model:
Two poisonous species evolved to look very similar in order to intensify the deterrence from predators:
Orange elephant ear sponge is bright orange coloured and lives on ocean reefs:
Cinnabar moth caterpillars have distinct black and yellow stripes:
Hagfishes automatically produce fibrous slime from their body when they are captured:



2.Compare the population of microorganisms during soybean fermentation. Which of the following rows describes the change in bacterial biodiversity and yeast biomass during the fermentation process?
Select one:
a.
Bacterial Biodiversity
Yeast Biomass
Decreases
Decreases
 b.
Bacterial Biodiversity
Yeast Biomass
Increases
Decreases
 c.
Bacterial Biodiversity
Yeast Biomass
Decreases
Increases
 d.
Bacterial Biodiversity
Yeast Biomass
Increases
Increases


3. Egypt is located in Northern Africa and is bordered by the Mediterranean Sea, Red Sea, Libya, Sudan, Jordan and Saudi Arabia.

The current population growth rate is 2.5%, where the birth rate far exceeds the death rate. The majority of the population resides close to the banks of the Nile River, which represents 5% of Egypt’s total land size.

Which of the following rows identify the age–structure diagram of Egypt and the reason for the shape of the diagram?
Select one:
a.
Diagram
Reason
1
Egypt is showing a population growth at carrying capacity.
 b.
Diagram
Reason
3   Egypt is showing a positive growth rate, where population size is increasing.
 c.
Diagram
Reason
2   Egypt is showing a negative growth rate, where the population size is shrinking.


4.
Which of the following rows correctly highlight the different types of competition present during the early and late stages of succession?
Select one:
a.
Early Stage
Late Stage
High intraspecific competition
Low interspecific competition
 b.
Early Stage
Late Stage
Low interspecific competition
Low intraspecific competition
 c.
Early Stage
Late Stage
High interspecific competition
High intraspecific competition
 d.
Early Stage
Late Stage
High intraspecific competition
High interspecific competition

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