Which of the following definitions best describes niche? * a-The role or function of an organism or species in an ecosystem

b-All the organisms that live in a place together with their nonliving environment

c-Where an organism lives, including the biotic and abiotic factors that affect it

d-Assemblage of different populations that live together in a defined area,​

When analyzing tree rings, what do scientists assume a thin ring indicates?

Why zebra fish experience similar genetic disease as human

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.