Which of the following statements accurately describes fat cell development? a. The number of fat cells grows substantially during early adulthood, as energy expenditure begins to decline. b. Researchers have concluded there is no way to induce fat cell death. c. While fat cells grow and shrink in size, their number is fixed. d. An obese person has more and larger fat cells than does a healthy-weight person. e. When energy out exceeds energy in, the number and size of fat cells decrease.

The production of cells during mitosis into specialized function is recombination or differentiation

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.