how can I draw a model of how the rhinos have changed in the last 50 years as a result of environmental changes. PLS HELP

Aboy jumps into a cold swimming pool and his body tempature goes down hus muscles ,blood vessels

What does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons