Consider two pure-breeding strains of mice (naked and hairless), each homozygous for an independently discovered recessive mutation that prevents hair formation on the body. When naked and hairless mice were crossed with each other, all offspring were phenotypically wild type. A self cross of F1 mice resulted in 115 wild type mice and 85 mutant mice. The number of genes involved are ; the best explanation for these numbers is :

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass