Which type of water is the least dense?
a. warm water with no salt
b. warm, salty water
c. cold, salty water
d. cold water with no salt

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

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?