Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Adaptation is the biological process where organisms evolve features to survive in their environment. These are categorized into structural (physical features) and behavioral (actions).
Plants perform photosynthesis to create food, represented by the chemical equation: .
Xerophytes are plants adapted to dry environments. They often have thick waxy cuticles and spines instead of leaves to reduce the loss of via transpiration.
Hydrophytes are aquatic plants that have large air spaces to stay afloat and facilitate the exchange of gases like and .
The Surface Area to Volume ratio () is a crucial adaptation factor. Animals in cold climates often have smaller ears and tails to decrease the surface area available for heat loss.
Camouflage and mimicry are structural adaptations that help organisms avoid predators or sneak up on prey by blending into their surroundings.
Hibernation is a behavioral adaptation where an animal's metabolic rate drops significantly, reducing the need for energy (glucose, ) during cold months.
📐Formulae
(Simplified heat loss concept)
💡Examples
Problem 1:
A desert plant has a thick, fleshy stem. If the stem stores mL of and loses mL per day through transpiration, how long can it survive without rain?
Solution:
Explanation:
Succulent stems are structural adaptations for water storage in arid biomes where is scarce.
Problem 2:
Explain why a Polar Bear has a small surface area to volume ratio () compared to a Fennec Fox.
Solution:
A smaller ratio minimizes the area exposed to the cold, reducing heat loss.
Explanation:
Because heat loss occurs at the surface, larger, rounder bodies (lower ) retain internal thermal energy more efficiently in temperatures below .
Problem 3:
Identify the gas released by plants during the day that is essential for animal survival.
Solution:
(Oxygen)
Explanation:
During photosynthesis, plants take in and release as a byproduct, which animals use for cellular respiration.