xWhich term describes a product of photosynthesis?(1 point)
Responses
energy
energy
carbon dioxide
carbon dioxide
glucose
glucose
water
wat
er
Which term describes a product of photosynthesis?
The term that describes a product of photosynthesis is "glucose."
Which statement is true? (1 point)
Responses
Cellular respiration begins with glycolysis in the cytoplasm.
Cellular respiration begins with glycolysis in the cytoplasm.
Cellular respiration begins with the Krebs cycle in the cytoplasm.
Cellular respiration begins with the Krebs cycle in the cytoplasm.
Cellular respiration begins with glycolysis in the mitochondria.
Cellular respiration begins with glycolysis in the mitochondria.
Cellular respiration begins with the Krebs cycle in the mitochondria.
Cellular respiration begins with the Krebs cycle in the mitochondria.
The statement that is true is: "Cellular respiration begins with glycolysis in the cytoplasm."
Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during cellular respiration?
During cellular respiration, radioactive hydrogen will combine with oxygen to form radioactive water, which will be broken down into non-radioactive water and carbon dioxide. The carbon dioxide will then be released into the atmosphere through respiration or used for further photosynthesis. Therefore, the radioactive hydrogen will become diluted in the water and carbon dioxide produced during cellular respiration.
Scientists used radioactive hydrogen to make water. They grew plants using the radioactive water. What happened to the radioactive hydrogen during cellular respiration?(1 point)
Responses
It was recycled into water.
It was recycled into water.
It was recycled into hydrogen gas.
It was recycled into hydrogen gas.
It was recycled into protein.
It was recycled into protein.
It was recycled into glucose.
It was recycled into glucose.
The radioactive hydrogen combines with oxygen to form radioactive water. During cellular respiration, this radioactive water is broken down into non-radioactive water and carbon dioxide, so the radioactive hydrogen was recycled into water.
If producers generate 100% of the energy, what percentage of that energy is left by the time it reaches tertiary consumers?
Only about 0.1% of the energy is typically left for tertiary consumers by the time it reaches them. This is known as the 10% rule of energy transfer in ecosystems.
Why is only 10% of energy transferred from one trophic level to the next?
Only about 10% of energy is transferred from one trophic level to the next because some of the energy is lost at each level through processes like respiration, heat loss, and incomplete digestion. Additionally, not all parts of an organism may be eaten and digested, and some parts may not provide as much energy as others. This means that only a fraction of the energy in one trophic level is available for the next level. As a result, there is a decrease in the amount of energy passed on from one level to the next, which over time limits the number of trophic levels that can be supported by an ecosystem.
Why is only 10% of energy transferred from one trophic level to the next? (1 point)
Responses
because energy is used up when consumers eat producers
because energy is used up when consumers eat producers
because producers need most of the energy for photosynthesis
because producers need most of the energy for photosynthesis
because energy is used for metabolism at each level
because energy is used for metabolism at each level
because energy is lost to the environment as heat between levels
because energy is lost to the environment as heat between levels