Why were both rows and columns used in the periodic table?

Which chemical test shows the presence of an enzyme in a biological washing powder? A. Benedict's B. Biuret C. Ethanol emulsion D. Iodine solution

Which is a change early farmers made to their environment? a. They planted orchards. b. They burned undergrowth. c. They created terraced farming. d. They built dams.

which of the following is the best explanation of why a second control group was included in this experiment

Suppose that a population of bacteria triples every hour and starts with 400 bacteria. find an expression for the number n of bacteria after t hours.

Most organic polymers are named based on the monomers used in their production. True or False

Which of the following statements is not true? Essential nutrients can be synthesized by the body. Vitamins are required in small quantities for bodily function.

Trees have active transport, why?

The question is how many chromosomes are in the sperm cells, and how many chromosomes will it's zygote have.

Recent research has found that on one island of the Galapagos two finch species interbred. This interbreeding may have resulted in a hybrid species that ultimately led to the extinction of one of the species Darwin discovered.

Which of the following statements about internal membranes in eukaryotic cells is false? a. In eukaryotic cells, internal membranes standardize the internal environment of all cellular organelles. b.