bio Flashcards
How are humans impacting the carbon cycle?
Burning fossil fuels like coal, oil, and natural gas releases excess CO₂ into the atmosphere. This adds more carbon than the natural cycle can handle, disrupting the carbon cycle.
Describe the threats to biodiversity from human activity in a given natural area of biological significance or conservation area.
In the Amazon Rainforest, human activities threaten biodiversity. Deforestation destroys habitats. Mining pollutes ecosystems. Climate change stresses species. Overhunting reduces animal populations. These actions cause habitat loss and extinction.
Anylization of carbon cycle diagram.
The carbon cycle diagram shows how carbon moves through the environment. Photosynthesis removes CO₂ from the atmosphere and stores it in plants. Respiration and decomposition release CO₂ back into the atmosphere, and Fossil fuel combustion by humans adds extra CO₂.
How tempurature affects the rate of photosynthesis.
Temperature affects photosynthesis by influencing enzyme activity. At low temperatures, enzymes work slowly, reducing the rate of photosynthesis. As temperature increases, enzymes become more active, speeding up the process. However, at high temperatures, enzymes can become denatured and stop working, causing the photosynthesis rate to decrease. There’s an optimal temperature range where the rate is highest.
Lights that work best for photosynthesis.
Blue light and red light are the most effective for photosynthesis, as chlorophyll absorbs these wavelengths best.
Inputs and Outputs of photosynthesis of Light Dependent and Light Independent.
Light-Dependent Reactions:
Inputs: Water (H₂O), light energy
Outputs: Oxygen (O₂), ATP, NADPH
Light-Independent Reactions (Calvin Cycle):
Inputs: CO₂, ATP, NADPH
Outputs: Glucose (C₆H₁₂O₆), ADP, NADP+
real world exsample of how climate change affect biodiveristy
A real-world example of climate change affecting biodiversity is the Great Barrier Reef in Australia. Rising ocean temperatures due to climate change cause coral bleaching, where corals expel algae, leading to their death. This disrupts the entire ecosystem, as many marine species depend on the corals for food and shelter. As the reef ecosystem collapses, numerous species face extinction or forced migration.
