In all organisms some of the energy that is taken in
a) lost to the environment in the form of heat
b) lost to the environment in the form of chemical
c) lost to the environment in the form of solar
d) all of is lost to the environment.

 A) Lost to the environment in the form of heat

The chemical energy is the form of energy that is obtained from the food being eaten by the organism. This energy is converted into different forms.These include kinetic energy (required during muscular movement or contraction), electrical energy (required to transmit the nerve impulse) and light energy (useful in producing bio luminescence by the organisms). All these activities occurred due to different forms of energy, results in various exothermic reactions occurring inside the body of the organism. The product of exothermic reaction is heat energy, which is released as a by-product. This energy cannot be recycled to produce any other form of energy, that can be used again by the organisms. This energy is lost from the ecosystem.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!