Question

photosynthesis and cellular respiration students were asked to set up an experiment. each group was given 4 flasks, and each flask was set up according the table above. the flasks were sealed. cellular respiration and photosynthesis experiment table: flask number 1: 1 plant; 2: 2 goldfish; 3: 1 plant & 2 goldfish; 4: nothing part a if the flasks were left sealed for a week, which one would most likely have the largest amount of co2? a 1 b 2 c 3 d 4 part b which of these would help reduce the amount of carbon dioxide produced from your answer to part a? a add a plant to the flask b add a goldfish to the flask

Explanation:

PART A

Step1: Analyze Respiration/Photosynthesis

Goldfish (animals) respire: \( \text{Glucose} + \text{O}_2
ightarrow \text{CO}_2 + \text{H}_2\text{O} + \text{Energy} \), producing \( \text{CO}_2 \). Plants photosynthesize: \( \text{CO}_2 + \text{H}_2\text{O} \xrightarrow{\text{Light}} \text{Glucose} + \text{O}_2 \), consuming \( \text{CO}_2 \), and respire (produce \( \text{CO}_2 \)) too. Flask 1: 1 plant (photosynthesis consumes \( \text{CO}_2 \), respiration produces). Flask 2: 2 goldfish (only respiration, more \( \text{CO}_2 \) production). Flask 3: 1 plant + 2 goldfish (plant photosynthesizes to consume \( \text{CO}_2 \) from goldfish respiration, net \( \text{CO}_2 \) less than Flask 2). Flask 4: nothing (no respiration/photosynthesis, \( \text{CO}_2 \) remains low initially, but over time, maybe negligible change, but goldfish in Flask 2 produce more \( \text{CO}_2 \) via respiration. So Flask 2 (B) has most \( \text{CO}_2 \) as 2 goldfish respire, no plant to consume \( \text{CO}_2 \).

Step2: Confirm the Flask

Flask 2 (B) has 2 goldfish, which only respire (produce \( \text{CO}_2 \)) with no plant to photosynthesize (consume \( \text{CO}_2 \)). Flask 1 has a plant (consumes \( \text{CO}_2 \)), Flask 3 has a plant (consumes \( \text{CO}_2 \) from goldfish), Flask 4 has nothing. So Flask 2 (B) will have the largest \( \text{CO}_2 \) after a week.

To reduce \( \text{CO}_2 \), we need a process that consumes \( \text{CO}_2 \), which is photosynthesis (done by plants). Adding a plant (Option A) will allow photosynthesis: \( \text{CO}_2 + \text{H}_2\text{O} \xrightarrow{\text{Light}} \text{Glucose} + \text{O}_2 \), consuming \( \text{CO}_2 \). Adding a goldfish (Option B) would increase respiration (more \( \text{CO}_2 \) production). So adding a plant (A) helps reduce \( \text{CO}_2 \).

Answer:

B. 2

PART B