Auroras are lights that appear at earth’s northern and southern poles. what is the main cause of an aurora? 1.solar wind enters earth’s atmosphere, and particles interact with ions. 2.bubbles of gas are ejected from earth’s outer crust. 3.sunlight reflects off the surface of the moon during an eclipse. 4.the northern and southern poles are cooler than the rest of earth.

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream? the ability to attract prey by glowingextra gills, for oxygen extractionthe ability to grow largerextra fat, for warmth

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Which of these transport mechanisms moves glucose from the blood into a cell? active transport diffusion facilitated diffusion osmosis