If a white dwarf in a binary star pair is accreting mass and it exceeds the 1.4msun limit, it will:

turn into a neutron star
turn into a black hole
turn into a main sequence star.
explode

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils