Key examples of index fossils include several species of ___, which are an extinct group of marine animals whose hard-shelled bodies had three sections.

What adaptations can prey use to avoid predation

What is earths lithospheric plates interact at

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only