Identify which statement represents a scientific law.
a) black holes exist.
b) some numbers are more lucky than others.
c) energy can be neither created nor destroyed.
d) the core of the sun has a temperature of 14.5 million centigrade.

How does natural selection change thephenotypes within a population over time?

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

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion