The following shows a food chain in a garden environment. Sun → grass → grasshopper → bird
Which statement describes the energy transfer in this food chain?

A. The energy from the bird is transferid back to the grasshopper.

B. Only a small amount of the energy the bird receives from the grasshopper is used by the bird.

C. The grass passes all of the energy it receives from the sun to the grasshopper.

D. More energy is transferred from the grass to the grasshopper than from the grasshopper to the
bird.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

not sure if this is what you'r looking for eubacteria and archaebacteria