The hip bone of a whale and the appendix of a human are referred to as because they have little current importance but were important in the ancestors of these organisms.

A. embryological structures

B. homologous structures

C. vestigial structures

D. mystery structures

E. analogous structures

Which statement best describes the relationship between observations and conclusions? a) observations are based on conclusions b) conclusions are based on observations c) observations and conclusions both depend on research d) neither conclusions nor observations depend on research.

In 1992, hurricane andrew left a wake of destruction through florida. one victim of the storm was a reptile-breeding facility. over 900 burmese pythons were set free, and today thousands of pythons live in florida. these pythons are an invasive species, or a harmful species not native to the region. 1. what impacts do you think the burmese pythons might have on local ecosystems

In which layer do organisms on earth love?