Otters and the Bottleneck Effect-Amplify Science

Imagine Aiden, Sawyer, and Christian are studying about population dynamics. They came across a term 'bottleneck effect'. Can you help them understand what it is?

• It's when a population shrinks suddenly due to an outside cause

• It's when a population grows rapidly due to an outside cause

• It's when a population stays the same size due to an outside cause

• It's when a population migrates to a new location due to an outside cause

Answer explanation

The bottleneck effect occurs when a population experiences a sudden decrease in size due to an external event, such as a natural disaster or human intervention. This reduction in population size leads to a loss of genetic diversity, as the surviving individuals may not represent the full range of genetic variation present in the original population. In this case, the correct choice is that it's when a population shrinks suddenly due to an outside cause.

Elah, Kelsey, and Aubree are studying the bottleneck effect in their biology class. They are debating how this effect changes the genetic makeup of a population. What do you think?

• It increases the genetic variation in the population

• It decreases the genetic variation in the population

• It has no effect on the genetic variation in the population

• It causes the population to go extinct

Maverick, Tanner, and Alyssa are having a debate. They are trying to figure out which species experienced a recent bottleneck. Can you help them settle this?

• Sea otters

• Jelly beans

• Humans

• Sea turtles

What happened to the sea otter population between the 1700s and 1911?

• It multiplied like rabbits

• It remained as steady as a rock

• It shrank faster than a snowball in summer

• It packed up and moved to a new address

How many otters were left in the world at that time (around 1911)?

• 2,000

• 100,000

• 1 million

• 10 million

Hey Tommi, Seth and Cameron, can you guess the current population of sea otters? It's a fun fact to know!

• 2,000

• 100,000

• 1 million

• 10 million

Dominic, Lucas, and Mason are having a heated debate about sea otters. They are trying to figure out the main reason for the decrease in genetic variation in the sea otter population. Can you help them settle this debate?

• Is it because of hunting by humans?

• Could it be due to natural disasters?

• Maybe it's because of rapid climate change?

• Or is it due to migration to new habitats?

Imagine you're on a field trip with Trenton, Mason, and Adam and you come across a group of sea otters. What could be a potential problem for the sea otter population in the future?

• Lack of food sources

• Overpopulation

• Too much genetic variation

• Migration to new habitats

Jadon, and Adam are having a debate. They are trying to figure out which species are currently going through a bottleneck. Can you help them?

• Endangered species

• Sea otters

• Jelly beans

• Humans

Jayden, Natalie, and Bella are studying genetics and they came across a tricky concept. They are wondering, what happens to the genetic variation of a population after a so-called 'bottleneck' event?

• It increases

• It stays the same

• It decreases

• It becomes random