The original source of energy in the food you eat is the sun.
What is the original source of energy in the food you eat?(1 point)
photosynthesis
photosynthesis
plants
plants
sun
sun
sugar
sugar
11 answers
Why are leaves red in the fall?(1 point)
Responses
Mitochondria breaks down because there's less sunlight.
Mitochondria breaks down because there's less sunlight.
Chlorophyll breaks down because there's less sunlight.
Chlorophyll 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.
Responses
Mitochondria breaks down because there's less sunlight.
Mitochondria breaks down because there's less sunlight.
Chlorophyll breaks down because there's less sunlight.
Chlorophyll 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.
Leaves are red in the fall because chlorophyll breaks down because there's less sunlight. This breakdown reveals other pigments, such as anthocyanins, which can give the leaves their red color.
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 stroma.
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 thylakoid membrane.
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 stroma.
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 thylakoid membrane.
The true statement is: The Calvin cycle is the light-independent (does not need light) step of photosynthesis and happens in the stroma.
The original energy for photosynthesis to begin comes from:(1 point)
Responses
water molecules
water molecules
ATP
ATP
light
light
carbon dioxide molecules
Responses
water molecules
water molecules
ATP
ATP
light
light
carbon dioxide molecules
The original energy for photosynthesis to begin comes from light.
Consider the reactants and products of cellular respiration. Which equation best models the process?(1 point)
Responses
water + carbon dioxide → glucose + oxygen + energy
water + carbon dioxide → glucose + oxygen + energy
water + carbon dioxide + energy → glucose + water
water + carbon dioxide + energy → glucose + water
glucose + oxygen → water + carbon dioxide + energy
glucose + oxygen → water + carbon dioxide + energy
glucose + oxygen + carbon dioxide → water + energy
Responses
water + carbon dioxide → glucose + oxygen + energy
water + carbon dioxide → glucose + oxygen + energy
water + carbon dioxide + energy → glucose + water
water + carbon dioxide + energy → glucose + water
glucose + oxygen → water + carbon dioxide + energy
glucose + oxygen → water + carbon dioxide + energy
glucose + oxygen + carbon dioxide → water + energy
The equation that best models the process of cellular respiration is: glucose + oxygen → water + carbon dioxide + energy.
Lactic acid fermentation can be modeled by which equation?(1 point)
Responses
Pyruvic acid + NAD+ → Lactic acid + NADH
Pyruvic acid + NAD+ → Lactic acid + NADH
Pyruvic acid + NADH → Lactic acid + NAD+
Pyruvic acid + NADH → Lactic acid + NAD+
Lactic acid + NADH → Pyruvic acid + NAD+
Lactic acid + NADH → Pyruvic acid + NAD+
Lactic acid + NADH → Pyruvic acid NADH
Responses
Pyruvic acid + NAD+ → Lactic acid + NADH
Pyruvic acid + NAD+ → Lactic acid + NADH
Pyruvic acid + NADH → Lactic acid + NAD+
Pyruvic acid + NADH → Lactic acid + NAD+
Lactic acid + NADH → Pyruvic acid + NAD+
Lactic acid + NADH → Pyruvic acid + NAD+
Lactic acid + NADH → Pyruvic acid NADH
Lactic acid fermentation can be modeled by the equation: Pyruvic acid + NADH → Lactic acid + NAD+.
1 answer