LRHS STAAR Review Categories 3&4 part 2

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Which of these best demonstrates mutualism between certain types of bacteria and humans?

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In the mid-1980s an aggressive strain of algae known as Caulerpa was accidentally introduced into the Mediterranean Sea when a seaside aquarium cleaned out its tanks. The algae contains a toxin that prevents native herbivores from consuming it. Caulerpa quickly spread over the sea floor, crowding out many species including sponges, corals, sea fans, and lobsters.

Which statement explains the most likely impact Caulerpa has had on the biodiversity in the Mediterranean Sea?

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A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.

What effect does continual mowing have on the ecology of the field?

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The table lists some organisms found in a swamp ecosystem and their sources of energy.

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

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Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

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Grassland ecosystems in Texas have evolved to depend on periodic fires to return nutrients to the soil and encourage plant reproduction. Humans have prevented fires in many of these grassland areas, resulting in plant and animal communities with little diversity. Wildlife biologists often recommend purposefully starting fires called prescribed burns, which are monitored and controlled, in grassland ecosystems every 3 to 4 years. These biologists observe greater diversity in plant and animal life in the years following a prescribed burn.

What natural processes are the biologists attempting to imitate?

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Surtsey is an island located south of Iceland. The island was formed by a volcanic eruption and first appeared in 1963. The table below contains descriptions of changes in the population and diversity of species on Surtsey.

Which of these lists the descriptions in the correct order of ecological succession on Surtsey?

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Some organisms have genes that improve their ability to survive and reproduce. If the genes also help their offspring survive and reproduce, then which of the following will most likely increase?

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Lord Howe Island is a volcanic island in the Tasman Sea that is about 11 km long and 2.8 km wide. The island has two species of palm trees, Howea forsteriana and the more abundant Howea belmoreana. The two species do not interbreed even when they grow very close to each other.

Which evolutionary process fails to occur?

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Dead zones are low-oxygen areas that develop on the seafloor. Scientists hypothesize that phytoplankton blooms cause these dead zones. Phytoplankton blooms occur when excess nutrients are introduced by pollution from fertilizers, sewage plants, and the burning of fossil fuels.

Which of the following would most likely cause an increase in these contributors to dead zones?

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LRHS STAAR Review Categories 3&4 part 2

Which of these best demonstrates mutualism between certain types of bacteria and humans?

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.

What effect does continual mowing have on the ecology of the field?

The table lists some organisms found in a swamp ecosystem and their sources of energy.

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

Some organisms have genes that improve their ability to survive and reproduce. If the genes also help their offspring survive and reproduce, then which of the following will most likely increase?

A marine ecosystem is represented below.

What is lost to the environment at each of the trophic levels of this ecosystem?

Which of these best demonstrates mutualism between certain types of bacteria and humans?

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.

What effect does continual mowing have on the ecology of the field?

The table lists some organisms found in a swamp ecosystem and their sources of energy.

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

Some organisms have genes that improve their ability to survive and reproduce. If the genes also help their offspring survive and reproduce, then which of the following will most likely increase?

A marine ecosystem is represented below.

What is lost to the environment at each of the trophic levels of this ecosystem?

LRHS STAAR Review Categories 3&4 part 2

LRHS STAAR Review Categories 3&4 part 2

Which of these best demonstrates mutualism between certain types of bacteria and humans?

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.What effect does continual mowing have on the ecology of the field?

The table lists some organisms found in a swamp ecosystem and their sources of energy. When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift. Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

Some organisms have genes that improve their ability to survive and reproduce. If the genes also help their offspring survive and reproduce, then which of the following will most likely increase?

A marine ecosystem is represented below. What is lost to the environment at each of the trophic levels of this ecosystem?

Which of these best demonstrates mutualism between certain types of bacteria and humans?

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.What effect does continual mowing have on the ecology of the field?

The table lists some organisms found in a swamp ecosystem and their sources of energy. When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift. Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

Some organisms have genes that improve their ability to survive and reproduce. If the genes also help their offspring survive and reproduce, then which of the following will most likely increase?

A marine ecosystem is represented below. What is lost to the environment at each of the trophic levels of this ecosystem?

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.

What effect does continual mowing have on the ecology of the field?

The table lists some organisms found in a swamp ecosystem and their sources of energy.

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

A marine ecosystem is represented below.

What is lost to the environment at each of the trophic levels of this ecosystem?

A small town in the piney woods of East Texas has a soccer field composed of native grasses. The soccer field is mowed once a week.

What effect does continual mowing have on the ecology of the field?

The table lists some organisms found in a swamp ecosystem and their sources of energy.

When constructing an energy pyramid of the swamp ecosystem, which of these would be placed at the top of the pyramid?

Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among the cheetahs is due to genetic drift.

Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?

A marine ecosystem is represented below.

What is lost to the environment at each of the trophic levels of this ecosystem?