Which of the following statements best describes the major difference between metaphase 1 of meiosis and metaphase of mitosis? (a) in metaphase 1 tetard srts of homologous chromosomes stay together as they line up along the center of the cell (b) in metaphase homologous chromosomes sre separated as each sister chromatid set os pulled to one end of the cell (c) im metaphase sister chromatids are separated and pulled apart to form a total of four new haploid cells. (d) in metaphase 1 sets of sister chromatids line up at the center of the cell and spindle fibers pull them apart.

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.