Question

germinating pea seeds perform cellular respiration to grow. a scientist performs an experiment to study the amounts of oxygen utilized by the peas at two different temperatures. the graph shows the results of the experiment. how does temperature affect cellular respiration in the germinating pea seeds? the rate of cellular respiration is higher at 25°c compared to 10°c. the rate of cellular respiration is higher at 10°c compared to 25°c. the rate of cellular respiration remains the same over time at 10°c. the rate of cellular respiration decreases over time at 25°c.

Explanation:

To determine how temperature affects cellular respiration in germinating pea seeds, we analyze the options:

1. For cellular respiration, generally, higher temperatures (within an optimal range) increase the rate as enzymes involved work faster. 25°C is warmer than 10°C, so the rate at 25°C should be higher than at 10°C.
2. The second option is incorrect as higher temp (25°C) should have a higher rate than 10°C.
3. The third option is incorrect because cellular respiration rate can change over time even at a constant temperature (e.g., due to substrate availability, but also, the graph context implies comparing rates at different temps, and generally, over time with respiration, if resources are present, rate may be stable or change, but the key here is temp comparison).
4. The fourth option is incorrect as at 25°C (a favorable temp for many enzymes), the rate of respiration (oxygen utilization) is more likely to be higher and not decreasing over time in a typical experiment setup for germinating seeds (unless substrate is exhausted, but the question is about temp effect, not time - dependent substrate depletion as a primary factor here). So the correct option is the first one.

Answer:

A. The rate of cellular respiration is higher at \(25^{\circ}\text{C}\) compared to \(10^{\circ}\text{C}\)