Photosynthesis and Ecosystems Flashcards
7 cards from real BECE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Photosynthesis and Ecosystems flashcards as text
A plant living in a very dry desert is most likely to have which adaptation?
Answer: Thick, waxy leaves to reduce water loss
Thick, waxy cuticles on leaves reduce transpiration, helping desert plants conserve water.
Which biome is characterized by permanently frozen subsoil, very low temperatures, and low biodiversity?
Answer: Tundra
The tundra has permafrost (permanently frozen subsoil), extremely cold temperatures, and supports limited plant and animal life.
In photosynthesis, the Calvin cycle uses ATP and NADPH to produce which primary sugar?
Answer: Glucose (G3P)
The Calvin cycle uses ATP and NADPH to fix CO₂ into G3P (glyceraldehyde-3-phosphate), the immediate product used to build glucose.
What is the term for the variety of different species living within a specific ecosystem?
Answer: Biodiversity
Biodiversity refers to the number and variety of species in a given area, and it is a key measure of ecosystem health.
Which of the following is an example of a mutualistic relationship in an ecosystem?
Answer: Bees pollinating flowers while collecting nectar
Mutualism benefits both species — bees get nectar for food while flowers get pollinated, aiding reproduction.
Why do plants appear green to our eyes?
Answer: They reflect green light and absorb red and blue light
Chlorophyll absorbs red and blue wavelengths for photosynthesis and reflects green wavelengths, which we perceive as the green color of plants.
What happens to the rate of photosynthesis if a plant is moved from low light to bright light, assuming CO₂ and water are not limiting?
Answer: It increases
Increasing light intensity provides more energy for the light-dependent reactions, raising the rate of photosynthesis until another factor becomes limiting.