If you were to design a long-term research study to determine why there are no human births in lapland during the months of august, september, and october, you would need to also examine a comparison population of humans in which births took place every month. the primary reason for including a comparison population within the design of this experiment would be to

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.