1: In addition to observable traits, scientists use to classify living things. 2: It’s estimated that more than 2/3 of all classified organisms are insects. A(n) is a scientist who specializes in studying insects.

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a. doing door-to-door sellingb. using billboards to advertise the productsc. making online shopping services availabled. giving discounts on products

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

What organ is the first to receive nutrients that have been absorbed from the digestive tract?