The scientist finds fossilized remains of other species in the same rock layer as the trilobite. what can the scientist conclude about these other fossils? a. the organisms that formed them must have evolved from trilobites. b. the organisms that formed them likely also lived during the paleozoic era. c. the organisms that formed them are still living in modern times. d. the organisms that formed them likely went extinct before the paleozoic era.

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

Which allele is expressed in the first-generation offspring of parents that have two different traits? a. the segregated allele b. the true-breeding allele c. the recessive allele d. the dominant allele