Question

if there is 1000 calories in a secondary consumer, how many calories will be passed to the the tertiary when eaten
1000
1
10
100
what is the difference between chemical and nuclear energy?
nuclear is stored in the bonds of objects.
nuclear is stored in the bonds of molecules
chemical is stored in the bonds of objects
chemical is stored in the bonds of molecules
which of the following are likely possible outcomes for invasive species being introduced in an environment? select all that apply
the ecosystem will be unchanged.
the ecosystem will change due to unbalance.
native populations will be unaffected
native populations will suffer due to competition

Explanation:

Step1: Energy transfer in food chain

According to the 10% energy transfer rule in a food chain. When a secondary consumer is eaten by a tertiary consumer, only about 10% of the energy is passed on.
If the secondary consumer has 1000 calories, then the energy passed to the tertiary consumer is \(1000\times0.1 = 100\) calories.

Step2: Difference between chemical and nuclear energy

Chemical energy is stored in the bonds of molecules. Nuclear energy is stored in the nucleus of an atom.

Step3: Invasive species outcomes

Invasive species usually disrupt the ecosystem balance. They compete with native species for resources. So the ecosystem changes due to unbalance (\(10\%\) of the energy is passed from one trophic level to the next in a food chain. For the energy transfer question, if secondary consumer has \(E = 1000\) calories, energy to tertiary \(=E\times0.1\)). And native populations suffer due to competition. The ecosystem cannot remain unchanged and native populations are affected.

Answer:

• For the energy transfer question: 100
• For the energy difference question: Chemical is stored in the bonds of molecules
• For the invasive species question: The ecosystem will change due to unbalance, native populations will suffer due to competition