Biology STAAR Review

Front

What is positive thigmotropism in plants?

Back

Positive thigmotropism is a response in plants where they grow toward an object they come into contact with, often curling around it to maximize exposure to sunlight for photosynthesis.

Front

How does a decrease in producers affect an ecosystem?

Back

A decrease in producers leads to less energy being available in the ecosystem, making it less stable as it affects the entire food web.

Front

What is the difference between primary and secondary succession?

Back

Primary succession occurs in lifeless areas where soil is not present, while secondary succession occurs in areas where soil is already present after a disturbance.

Front

What role do sweat glands play in maintaining homeostasis?

Back

Sweat glands help regulate body temperature by releasing sweat when body temperature increases, which cools the body as the sweat evaporates.

Front

How much energy do herbivores typically incorporate from producers?

Back

Herbivores typically incorporate about 10% of the energy that producers capture from the sun.

Front

Define homeostasis in biological systems.

Back

Homeostasis is the process by which biological systems maintain a stable internal environment despite external changes.

Front

What is the role of producers in an ecosystem?

Back

Producers, such as plants, convert sunlight into chemical energy through photosynthesis, forming the base of the food web.

Front

Explain the concept of trophic levels in an ecosystem.

Back

Trophic levels represent the hierarchical levels in an ecosystem, where producers are at the first level, followed by primary consumers (herbivores), secondary consumers (carnivores), and so on.

Front

What is the significance of pioneer species in ecological succession?

Back

Pioneer species are the first organisms to colonize previously disrupted or damaged ecosystems, initiating the process of ecological succession.

Front

How do plants adapt to maximize photosynthesis?

Back

Plants adapt by growing towards light sources (phototropism) and developing structures like broad leaves to capture more sunlight.