What technological development caused large changes in science?
A. the invention of the wheel
B. the understanding of evolution
C. the invention of the microscope
D. the creation of DNA

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

Which of the following is an effect of the uneven heating of the earth by the sun? a sea breeze a land breeze a convection current all of the above

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.