Nan ecosystem, energy that flows to tertiary consumers ultimately originates from the sun. select the best answer from the choices provided t f

True

A food chain is a linear sequence of supply or transfer of food and energy when one organism is consumed by another in an ecosystem. The energy being transferred to different organisms can be studied on the basis of energy pyramid in which energy is distributed among organisms in subsequent trophic levels. At the base level, the producers or plants obtain energy from sun which they utilize to produce food or biomass energy. The biomass energy from plants is transferred to primary consumers or herbivores. The primary consumers are eaten up by secondary consumers. The secondary consumers are eaten up by tertiary consumers.

This can be concluded that the initial source of energy being distributed to all trophic levels in food chain is originated from sun. Therefore, the statement "In an ecosystem, energy that flows to tertiary consumers ultimately originates from the sun" is true.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.