When does an ecological succession occur?

Which statement best describes technology?

A farmer has expanded her farming capacity by converting an acre of grassland into tilled, farmed land. What can the farmer most likely expect to see in this acre of land as she continues to farm it over several years?

In 1988 several large forest fires occurred in the Yellowstone National Park. What process occurred after these fires?

Human activity can disrupt ecosystems on both small and large scales. Which of the following is an example of human activity disrupting a small-scale ecosystem?

When an ecosystem loses biodiversity, how does it change?

Types of proteins required for biochemical reactions

Gives instant energy to the cells

Made up of two carbohydrate units

Monomers of proteins

A molecule that is an integral part of the cell membrane

Identify the amino acid

Identify the cholesterol

Identify the disaccharide

What are the two products of the light dependent reactions that are used in the Calvin cycle?

What is one function of the photosystems, in the chloroplast?

What is ATP synthase?

What is the main function of photosynthesis?

One molecule of glucose is broken down into two molecules of pyruvate during this process.

When you exercise vigorously without a break your muscles run out of oxygen sooner than you can breathe and compensate. In these times, ________ accumulates from fermentation and results in fatigue and muscle cramps.

Identify the correct chemical equation for cellular respiration :

At which stage of cellular respiration most of the ATP is released?

What is the role of oxygen in aerobic cellular respiration?

Which of the following explains the ability of carbon to make long chains with each other?

Which two outputs of cellular respiration are also the inputs of photosynthesis?

In which of the following organelles does photosynthesis take place?

In which of the following organelles does cellular respiration take place?

An active cell, that requires a huge amount of energy every second, like the ones in the wall of your heart will have a lot of which organelle?

Photosynthesis and cellular respiration both use the electron transport chain that releases ATP. In photosynthesis, electron transport chain happens at the beginning of the process. What can you conclude from this?

How does deforestation affect the natural cycle of photosynthesis and cellular respiration?

What type of organisms can perform cellular respiration?

During droughts many green plants die because of lack of photosynthesis. Which reactant of photosynthesis are they missing?

The star closest to us is responsible for all energy on earth. Which one is it?

Green plants have openings in their leaves through which gases enter and exit. What are these openings/pores called?

If you cover a plant with an airtight cover, but keep watering it daily, it will soon die. Which of the following reactants of photosynthesis will be lacking here?

Why are producers able to harvest only about 1% of sun's energy?

Which of the following is an example of a neurotoxin that some algal blooms can produce?

Which of the following are considered as reservoirs of carbon? 

 Select ALL that apply.

Which of the following is the correct order of flow of energy in a food chain?

In the following food chain, which organism is the secondary consumer?

Flower →Butterfly → Frog → Heron

In the following food chain, which organism is the apex predator?

Flower →Butterfly → Frog → Heron

Which of the following feeding habits is that of an omnivore?

Which of the following feeding habits is that of an detritivore?

Below is a food chain. 

Algae ← Shrimp ← Tuna ← Human

Choose a correct option from the following that is true about this food chain.

The removal of a keystone species in an ecosystem will cause the entire food web to collapse. This phenomenon is also known as a - 

In which of the following biogeochemical cycles there is a significant role of bacteria?

Nitrogen is the most abundant gas in the atmosphere. But gaseous nitrogen is of no use to living organisms. They can only use nitrogen when gaseous nitrogen is converted into ammonia. What is this conversion called?

The only biogeochemical cycle without a gas phase is the - 

Higher concentration of toxins present in a food web are found in the bodies of topmost consumers. This phenomenon of building up of chemicals is known as - 

Ocean ecosystems act as a carbon sink removing atmospheric carbon dioxide, which is dissolved in the seawater. Which biological
process would then utilize this dissolved carbon dioxide?

Which phrase describes a scenario in which carbon is released from a reservoir?

A type of algae has been found living in two different habitats. Habitat A has a higher concentration of carbon dioxide than Habitat B. Based on this finding, which statement describes the most likely outcome?

52% of the solar radiation that comes towards earth is either absorbed in the atmosphere or reflected back into space. How much solar energy is absorbed by the ground and plants together?

Which mathematical relationship best defines the 10% rule?

adds carbon to the soil

adds carbon to the atmosphere

removes carbon from the geosphere

removes carbon from the atmosphere

The area where the Mississippi River empties into the Gulf of Mexico contains little to no oxygen. This is caused by an excess of nutrients, including nitrogen, from various sources, such as agricultural runoff.

Which activities could a farmer in this region do to help decrease the amount of nitrogen added into the Mississippi River? Which activities decrease nitrogen amounts?

The area where the Mississippi River empties into the Gulf of Mexico contains little to no oxygen. This is caused by an excess of nutrients, including nitrogen, from various sources, such as agricultural runoff.

Which activities could a farmer in this region do to help decrease the amount of nitrogen added into the Mississippi River? Which activities increase nitrogen amounts?

The direct result of excess phosphorus in the watershed is an increase in the amount of _____ in the habitat.

When these organisms eventually die, decomposers break down the carbon-based molecules in their bodies through the process of ______.

When these organisms eventually die, decomposers break down the carbon-based molecules in their bodies through the process of ______.

This process removes a large amount of the _____ from the water, which leads to the deaths of other aquatic organisms. 

The diagram shows a food web in a salt marsh. Select all the events that would cause a decrease in population density of herring gulls in a saltwater marsh ecosystem.

Below is the diagram of an ecological pyramid A. Choose the correct term that defines this pyramid.

Below is the diagram of an ecological pyramid B. Choose the correct term that defines this pyramid.

Below is the diagram of an ecological pyramid C. Choose the correct term that defines this pyramid.

Each level in a food chain contains less energy than the one below it because some energy is __________.

Rhizobium bacteria living symbiotically in root nodules of leguminous plants are important in the nitrogen cycle because they __________.

Which description fits with the term biomass?

Which of these possesses most of the energy in ecosystems?

Oceans are one of the largest carbon reservoirs in the earth. Addition of excess CO₂ in the atmosphere is causing it to react with the ocean water to make carbonic acid. This phenomenon is known as 'Ocean Acidification'. 

One of the direct effects of ocean acidification is - 

Clear-cutting forests is an unsustainable strategy of logging. This method involves indiscriminate removal of hundreds of trees creating empty patches in forests. This loosens the topsoil and makes it vulnerable to erosion. 

What is one effect of loose topsoil running off into the nearby waterbody?

The Easter island vegetation was removed by the first human inhabitants of the island. They cut down trees faster than they could grow back. The land was left barren. Animals, insects, birds and other organisms either died or migrated. 

In a few years, grasses start to grow in the open area. All we see now in Easter island is a grass-covered land with the stone statues made by the earliest human inhabitants.

It will take a few hundred years for the island to get back its forest by a natural process. What is this process called?

I am the brownish colored haze covering the air in densely-populated cities like LA and China. I am formed when the exhaust from gasoline cars react with oxygen in the presence of sunlight. I can trigger or aggravate respiratory symptoms like allergy, asthma, bronchitis etc. 

What am I?

Agricultural crop fields are fertilized using nitrogen and phosphorus compounds. These are essential nutrients for living organisms.

One environmental issue with these fertilizers is runoff. When they are washed with rain to the nearby water body, it can change the water body forever.

What change can happen to the waterbody soon after a fertilizer runoff?

When a giraffe eats leaves from a tree, it incorporates the leaves into its own __________.