Living Environment Flashcards
7 cards from real Regents practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Living Environment flashcards as text
Which process allows plants to convert light energy into chemical energy stored in glucose?
Answer: Photosynthesis
Photosynthesis uses light energy, water, and carbon dioxide to produce glucose and oxygen in chloroplasts.
A mutation in a gene that codes for a digestive enzyme causes the enzyme to lose function. Which level of biological organization is most directly affected first?
Answer: Molecule
A gene mutation directly alters the molecular structure of the protein (enzyme) it encodes.
Which term describes the variety of different species living within a single ecosystem?
Answer: Biodiversity
Biodiversity refers to the number and variety of different species found in a given area or ecosystem.
A student observes that a bacterial culture doubles in size every 20 minutes. After 1 hour starting with 100 bacteria, how many bacteria are present?
Answer: 800
In 60 minutes there are 3 doubling periods: 100 → 200 → 400 → 800.
Which structure in the cell is responsible for producing ATP through aerobic cellular respiration?
Answer: Mitochondrion
The mitochondrion is the site of aerobic cellular respiration, producing most of the cell's ATP.
A deer population in a forest increases rapidly when wolves are removed. This best illustrates the concept of:
Answer: Predator-prey relationships
Removing predators (wolves) allows the prey population (deer) to grow unchecked, demonstrating how predator-prey relationships regulate populations.
During meiosis, crossing over between homologous chromosomes results in:
Answer: Increased genetic variation in gametes
Crossing over exchanges segments of DNA between homologous chromosomes, producing new combinations of alleles and increasing genetic variation in gametes.