While working with heat in the laboratory, which of the following should you do? a. heat a liquid in a closed container b. point a heating container away from yourself c. reach across an open flame d. leave a flame or operating hot plate unattended

Which of the following observations darwin shape his concept of descent with modification? a) species diversity declines farther from the equator.b) fewer species live on islands than on the nearest continents.c) birds can be found on islands located farther from the mainland than the birdsê¹ maximum nonstop flightdistance.d) south american temperate plants are more similar to the tropical plants of south america than to thetemperate plants of europe.e) earthquakes reshape life by causing mass extinctions.