In Drosophila melanogaster, the wild-type eye colour is dark red. A fly from a true-breeding strain with scarlet eyes is crossed to a fly from a true-breeding strain with brown eyes. All the offspring have dark red eyes. The F1 flies are intercrossed to produce an F2 generation. This comprises 472 flies with dark-red eyes, 138 with scarlet eyes, 145 with brown eyes and 45 with white eyes. A. Three genes are segregating in this cross
B. Two independently assorting genes are segregating in this cross
C. Two linked genes are segregating in this cross
D. The phenotypes result from interactions between genes
E. The brown eye colour is the result of epistasis

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.

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?