QUIZ 1/31

what period biology do you have

• Period 1
• Period 2
• Period 4
• Period 6

Which one of these species was the key stone

• Otter
• Kelp
• Sea urchin
• Clam
• Plankton

What happens when they keystone species is removed from the ecosystem

• Nothing happens
• New species will talk its place in the ecosystem
• Mild changes in the ecosystem
• Drastic changes in the ecosystem

what is the trend with the kelp and sea urchin populations?

• kelp populations goes UP as sea urchins populations goes DOWN
• kelp populations goes UP as sea urchins populations goes UP
• kelp populations goes DOWN as sea urchins populations goes DOWN
• kelp populations goes DOWN as sea urchins populations goes UP

what is the trend with the sea urchins and sea otters populations?

• sea urchin populations goes UP as sea otter populations goes DOWN
• sea urchin populations goes UP as sea otter populations goes UP
• sea urchin populations goes DOWN as sea otter populations goes DOWN
• sea urchin populations goes DOWN as sea otter populations goes UP

when the Grow Rate = 1 what is happening with the population?

• Population size is growing.
• Population size is unchanged.
• Population size is decreasing.

Carrying capacity happened at what day on this graph?

• 3
• 13
• 17
• 23

What is the carrying capacity for this population?

• 2000
• 1500
• 1000
• 50

We have 2 types of limiting factors density dependent and density independent. Which is an example if density independent factor on a population.

• Competition
• Parasitism
• Disease
• Natural disaster
• Predation

What definition best fits a "population in homeostasis"

• A population to maintain a relatively stable size over time, despite fluctuations in environmental conditions
• A population to not maintain a relatively stable size over time, despite fluctuations in environmental conditions
• A population fluctuations in size over time due to environmental conditions
• A population rapidly increasing in size then crashing to extinction