Question

What is the original source of energy in the food you eat?(1 point)
Responses

sun
sun

photosynthesis
photosynthesis

sugar
sugar

plants
plants
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Answer
Why are leaves red in the fall?(1 point)
Responses

Chlorophyll breaks down because there's less sunlight.
Chlorophyll breaks down because there's less sunlight.

Mitochondria breaks down because there's less sunlight.
Mitochondria breaks down because there's less sunlight.

Chlorophyll reflects green light in the fall.
Chlorophyll reflects green light in the fall.

Chlorophyll absorbs red in the fall, rather than green.
Answer
Which statement is true?(1 point)
Responses

The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the stroma.
The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the stroma.

The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the thylakoid membrane.
The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the thylakoid membrane.

The Calvin cycle is the light-dependent (needs light) step of photosynthesis and happens in the thylakoid membrane.
The Calvin cycle is the light-dependent (needs light) step of photosynthesis and happens in the thylakoid membrane.

The Calvin cycle is the light-dependent (needs light) step of photosynthesis and happens in the stroma.
The Calvin cycle is the light-dependent (needs light) step of photosynthesis and happens in the stroma.
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Answer
The original energy for photosynthesis to begin comes from:(1 point)
Responses

carbon dioxide molecules
carbon dioxide molecules

water molecules
water molecules

light
light

ATP
Answer
Which equation best models cellular respiration?(1 point)
Responses

6H2O + 6CO2 → C6H12O6 + 6O2 + Energy
6H 2 O + 6CO 2  → C 6 H 12 O 6  + 6O 2  + Energy

6H2O + 6CO2 + Energy → C6H12O6 + 6O2
6H 2 O + 6CO 2  + Energy → C 6 H 12 O 6  + 6O 2

C6H12O6 + 6O2 → 6H2O + 6CO2 + Energy
C 6 H 12 O 6  + 6O 2  → 6H 2 O + 6CO 2  + Energy

C6H12O6 + 6O2 + 6CO2 → 6H2O + Energy
Answer
Lactic acid fermentation can be modeled by which equation?(1 point)
Responses

Lactic acid + NADH → Pyruvic acid + NAD+
Lactic acid + NADH → Pyruvic acid + NAD+

Lactic acid + NADH → Pyruvic acid NADH
Lactic acid + NADH → Pyruvic acid NADH

Pyruvic acid + NADH → Lactic acid + NAD+
Pyruvic acid + NADH → Lactic acid + NAD+

Pyruvic acid + NAD+ → Lactic acid + NADH
Answered by GPT-4o mini
The original source of energy in the food you eat is the **sun**. Through the process of photosynthesis, plants convert sunlight into chemical energy, which is then passed through the food chain.
Answered by GPT-4o mini
Leaves are red in the fall because **chlorophyll breaks down because there's less sunlight**. As chlorophyll fades, other pigments, such as anthocyanins, become more visible, giving leaves their red, orange, and yellow hues.
Answered by GPT-4o mini
The true statement is: **The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the stroma.**
Answered by GPT-4o mini
The original energy for photosynthesis to begin comes from **light**.
Answered by GPT-4o mini
The equation that best models cellular respiration is:

**C6H12O6 + 6O2 → 6H2O + 6CO2 + Energy.**

This represents glucose and oxygen being converted into water, carbon dioxide, and energy (usually in the form of ATP).
Answered by GPT-4o mini
Lactic acid fermentation can be modeled by the equation:

**Pyruvic acid + NADH → Lactic acid + NAD+.**

This represents the conversion of pyruvic acid into lactic acid with the reduction of NADH to NAD+.