Question

fill in the chart comparing and contrasting cell respiration and photosynthesis.

	photosynthesis	cell respiration
organelle for process
inputs (reactants)
cycle of chemical reactions
outputs (products)

animals do not perform photosynthesis; however, it is essential to our survival. explain this.

Explanation:

For the chart (filling in the blanks):

Organelle for process:

• Photosynthesis: Chloroplast (the organelle in plant cells and some algae where photosynthesis occurs, containing chlorophyll to capture light energy).
• Cell Respiration: Mitochondria (the "powerhouse" of the cell, where most of the cellular respiration process, especially the aerobic part, takes place).

Inputs (Reactants):

• Photosynthesis: Carbon dioxide ($\ce{CO_2}$), water ($\ce{H_2O}$), and light energy (light is the energy source, while $\ce{CO_2}$ and $\ce{H_2O}$ are the chemical reactants).
• Cell Respiration: Glucose ($\ce{C_6H_{12}O_6}$) and oxygen ($\ce{O_2}$) (glucose is broken down, and oxygen is used to help release energy from it).

Cycle of chemical reactions:

• Photosynthesis: Calvin cycle (also known as the light - independent reactions, where carbon dioxide is fixed into glucose using the energy from ATP and NADPH produced in the light - dependent reactions).
• Cell Respiration: Krebs cycle (also called the citric acid cycle, which is a series of chemical reactions that break down acetyl - CoA derived from glucose, producing ATP, NADH, and $\ce{FADH_2}$; glycolysis (the breakdown of glucose into pyruvate) also occurs before the Krebs cycle in the overall respiration process).

Outputs (Products):

• Photosynthesis: Glucose ($\ce{C_6H_{12}O_6}$) and oxygen ($\ce{O_2}$) (glucose is the energy - rich organic molecule produced, and oxygen is a by - product released into the atmosphere).
• Cell Respiration: Carbon dioxide ($\ce{CO_2}$), water ($\ce{H_2O}$), and ATP (adenosine triphosphate, the energy currency of the cell; $\ce{CO_2}$ and $\ce{H_2O}$ are waste products of the process).

For the explanation part ("Animals do not perform photosynthesis; however, it is essential to our survival. Explain this."):

Animals rely on the products of photosynthesis. Plants (and other photosynthetic organisms) produce glucose through photosynthesis, which is a source of chemical energy. Animals consume plants (or other animals that ate plants) to obtain this glucose for their own cellular respiration to produce ATP, which is needed for all life processes like movement, growth, and reproduction. Also, photosynthesis produces oxygen ($\ce{O_2}$) as a by - product. Animals need this oxygen for their own cellular respiration (specifically for the aerobic respiration that occurs in the mitochondria). Without photosynthesis, there would be no continuous supply of oxygen in the atmosphere and no production of glucose (the base of the food chain), so even though animals don't photosynthesize, the process is vital for providing the energy - rich molecules and oxygen they need to survive.

Answer:

For the chart (filling in the blanks):

Organelle for process:

• Photosynthesis: Chloroplast (the organelle in plant cells and some algae where photosynthesis occurs, containing chlorophyll to capture light energy).
• Cell Respiration: Mitochondria (the "powerhouse" of the cell, where most of the cellular respiration process, especially the aerobic part, takes place).

Inputs (Reactants):

• Photosynthesis: Carbon dioxide ($\ce{CO_2}$), water ($\ce{H_2O}$), and light energy (light is the energy source, while $\ce{CO_2}$ and $\ce{H_2O}$ are the chemical reactants).
• Cell Respiration: Glucose ($\ce{C_6H_{12}O_6}$) and oxygen ($\ce{O_2}$) (glucose is broken down, and oxygen is used to help release energy from it).

Cycle of chemical reactions:

• Photosynthesis: Calvin cycle (also known as the light - independent reactions, where carbon dioxide is fixed into glucose using the energy from ATP and NADPH produced in the light - dependent reactions).
• Cell Respiration: Krebs cycle (also called the citric acid cycle, which is a series of chemical reactions that break down acetyl - CoA derived from glucose, producing ATP, NADH, and $\ce{FADH_2}$; glycolysis (the breakdown of glucose into pyruvate) also occurs before the Krebs cycle in the overall respiration process).

Outputs (Products):

• Photosynthesis: Glucose ($\ce{C_6H_{12}O_6}$) and oxygen ($\ce{O_2}$) (glucose is the energy - rich organic molecule produced, and oxygen is a by - product released into the atmosphere).
• Cell Respiration: Carbon dioxide ($\ce{CO_2}$), water ($\ce{H_2O}$), and ATP (adenosine triphosphate, the energy currency of the cell; $\ce{CO_2}$ and $\ce{H_2O}$ are waste products of the process).

For the explanation part ("Animals do not perform photosynthesis; however, it is essential to our survival. Explain this."):

Animals rely on the products of photosynthesis. Plants (and other photosynthetic organisms) produce glucose through photosynthesis, which is a source of chemical energy. Animals consume plants (or other animals that ate plants) to obtain this glucose for their own cellular respiration to produce ATP, which is needed for all life processes like movement, growth, and reproduction. Also, photosynthesis produces oxygen ($\ce{O_2}$) as a by - product. Animals need this oxygen for their own cellular respiration (specifically for the aerobic respiration that occurs in the mitochondria). Without photosynthesis, there would be no continuous supply of oxygen in the atmosphere and no production of glucose (the base of the food chain), so even though animals don't photosynthesize, the process is vital for providing the energy - rich molecules and oxygen they need to survive.