What best defines biodiversity?

A. The variety of traits a species has
B. A group of organisms of one species
C. All the different habitats and ecosystems found around the planet and in outer space D. All the different plants, animals, fungi, microorganisms, and variety of ecosystems found on Earth

Eristics do scientists use to distinguish between organisms in different kingdoms

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Which sentence is an example of a strong conclusion to an autobiography? a. i stayed after school three days in a row to practice onstage in the auditorium. b. i knew i would have to practice all week to memorize my dance for the recital. c. after the recital was over, i knew practicing was worth it, and i was looking forward to my next big challenge. d. on opening night, i danced in front of a packed auditorium.