Keystone Anchor 8

Welcome to Biology!

​Today: Biology Keystone Anchor 8: Ecosystems
Next Time: Scientific Theories & Evolutionary Theory

Joke of the Day:
What happens to an illegally parked frog?

Welcome to Biology!

​Today: Biology Keystone Anchor 8: Ecosystems
Next Time: Scientific Theories & Evolutionary Theory

Joke of the Day:
What happens to an illegally parked frog?

It gets toad away.

Happy Birthday to:
Nicole D (5/10), Miley (5/10) and
Brayden I (5/9)!

Multiple Choice

The table below shows the genotypes that result in four different blood types in humans.

Based on the information in the table, which of the following describes this pattern of inheritance?

• The IA and IB alleles show sex linkage.

• The IA allele is recessive to the IB allele.

• The IA allele is dominant to the IB allele.

• The IA and IB alleles show codominance.

Multiple Choice

Hemophilia is an X-linked recessive condition in which blood does not clot properly. Queen Victoria of England had one allele for hemophilia. Which of the following statements describes the most likely pattern for the occurrence of hemophilia in Queen Victoria’s descendants?

• All of Queen Victoria’s children had hemophilia.

• All of Queen Victoria’s children were carriers for hemophilia.

• Female descendants of Queen Victoria could not pass on the gene for hemophilia.

• More male descendants than female descendants of Queen Victoria had hemophilia.

Multiple Choice

Human HLA genes have as many as 100 different alleles per gene. The alleles code for proteins that are involved in accepting or rejecting an organ following an organ transplant. Which statement correctly explains why this multiple allele inheritance pattern makes it difficult to match an organ donor with an organ recipient?

• Each organ in a person’s body expresses a different allele.

• The donor must have dominant alleles for the organ to be accepted.

• The alleles cannot mutate in the recipient’s body after the transplant.

• Most people do not have the same combination of alleles for the genes.

Multiple Choice

Larry is treated for type 1 met-H with vitamin C, and his skin no longer looks blue. How does this affect the likelihood of Larry passing on the allele for type 1 met-H to his offspring?

• Larry will now pass on a normal allele to his offspring.

• Larry will still pass on an allele for type 1 met-H to his offspring.

• Larry will only pass on an allele for type 1 met-H if his offspring is male.

• Larry will have less of a chance of passing on an allele for type 1 met-H to his offspring.

• Abiotic Factor

• Acid Rain

• Autotroph

• Biodiversity

• Biogeochemical Cycle

• Biomagnification

• Biomass

• Biome

• Biosphere

• Biotic Factor

• Carnivore

• Carrying Capacity

Vocabulary:

• Chemosynthesis

• Climate

• Commensalism

• Community

• Competitive

• Consumer

• Decomposer

• Deforestation

• Demography

• Density Dependent

• Density Independent

• Desertification

• Detritivore

• Ecological Footprint

• Ecological Hotspot

• Ecological Pyramid

• Ecology

• Ecosystem

• Ecosystem Diversity

• Emigration

• Estuary

• Exponential Growth

• Extinction

• Food Chain

• Food Web

• Genetic Diversity

Multiple Choice

A fight between a family of lions and a family of hyenas over an animal carcass is best described as competition between which of the following?

• two different populations

• two different communities

• a population and a community

• a community and an ecosystem

Multiple Choice

Which of the following shows the organizational level of a biome from the biggest category to the smallest category?

• biome → ecosystem → community → population → organism

• biome → community → ecosystem → population → organism

• biome → ecosystem → population → community → organism

• biome → population → community → ecosystem → organism

Multiple Choice

Succulent plants, such as cacti, are most often found in which terrestrial biome?

• desert

• grassland

• rainforest

• tundra

Multiple Choice

Which factor has the greatest influence on the type of ecosystem that will form in a particular geographic area?

• genetic variations in the animals

• climate conditions

• number of carnivores

• percentage of nitrogen gas in the atmosphere

Multiple Choice

An organism makes glucose using energy from the sun. Which of the following best describes that organism?

• decomposer

• primary consumer

• producer

• secondary consumer

Multiple Choice

A food chain is shown below.

Grass → Rabbit → Weasel → Fox → Fungi

Which population would most likely increase if the weasel was removed from the food chain?

• rabbit

• fox

• grass

• fungi

Multiple Choice

Which of the following best describes how plants transfer carbon in the carbon cycle?

• Plants absorb carbon from the soil.

• Carbon transpires from plant stomata.

• Plants fix carbon in the soil using their roots.

• Carbon is transferred through the food chain when plants are eaten by animals.

Multiple Choice

Agricultural runoff can carry fertilizers into lakes and streams. This runoff can cause algae populations to greatly increase. What effect does this change in the algae population most likely have on lakes and streams?

• It causes an increase in water level.

• It causes an increase in water clarity.

• It reduces the dissolved oxygen needed by fish and shellfish.

• It reduces the temperature variations near the surface of the water.

Multiple Choice

Populations of typical prey animals, such as deer, might exceed the carrying capacity of an ecosystem if top predators, such as mountain lions, are removed. 

Without the mountain lions, increased numbers of deer may reduce the food supply available to other herbivores, such as field mice and crickets. As a result, populations of deer, mice, and crickets might decline, causing a population decrease in species that feed on these organisms as well.

This example implies that properly functioning predator/prey relationships do which of the following?

• harm all of the organisms in an ecosystem

• throw an ecosystem out of balance

• result in food shortages for the entire ecosystem

• maintain balance within an ecosystem

Open Ended

Isle Royale is located in Lake Superior. Isle Royale is home to populations of wolves and moose. The interactions between the wolves and moose, as well as the individual population sizes, have been studied since 1958.

The graph below shows the population sizes over time for both wolves and moose.

Describe one limiting factor for the moose population.

Open Ended

Explain one likely reason why the wolf population rapidly increased between 1975 and 1980.

Open Ended

Predict what will happen to the moose population’s size after 1994 by describing the shape of the curve. In your answer, be sure to explain the reasoning behind your prediction.

Poll

How confident do you feel about this topic for the Keystones?

• Very confident.

• Confident.

• Not scared because I'm not taking it!

• Scared.

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