I think it's true hope I helped:)
Answer:
The amount of energy in the first level determines how many animals can be supported on the subsequent levels.
The first level of the energy pyramid usually consists of the producers which are the main source of energy for a food web or a food chain. They determine that how many number of species can be supported by the particular ecosystems at each subsequent levels of the energy pyramid. They are the main source through which energy arises in an ecosystem.
Huh ??? please provide more information
Cardiac Output. Cardiac Output (CO) is the amount of blood pumped by the heart per unit of time and it depends on 2 important variables like below, Stroke Volume (SV) = the amount of blood ejected per beat of the heart (Normally, 70 ml/beat). Heart rate (HR) = heart beats per minute (normally, 70 beats/min).
The advantage of sexual reproduction over asexual reproduction is that the organisms produced are each diverse. For example, with bacteria, if each is genetically the same and there is a way to "kill" them, all of them will die. However with sexual reproduction, each organism will be different, and have natural selection, they will build up immunities and grow and change.