A new chemical to make fabric waterproof is tested. One fabric couch is treated with the chemical and another identical couch is not. Which is the experimental group?

Unlike food webs, food chains a. involve a network of complex interactions among various organisms in an ecosystem. b. contain consumers that eat producers. c. contain autotrophs that make their own food. d.

Which of the following describes a reason for making a prediction when doing a controlled experiment? a. to identify a useful and reliable source of scientific information b. to prove that a hypothesis is true before it is tested in an experiment c.

By comparing fossils of a species from long ago to those of today, we can conclude that

How does the electron transport chain active during the Krebs cycle affect the hydrogen ion concentration in a mitochondria

Burning a candle is a chemical change. What is the primary evidence that burning the candle is a chemical reaction? A) change in odor B) change in color C) formation of a solid D) temperature change

True or False: The humidity of a desert is most likely described as arid. TH

Describe the process of desertification

During transcription in eukaryotes, a type of RNA polymerase called RNA polymerase II moves along the template strand of the DNA in the 3'→5' direction.

A plant species live in an area with limited sunlight

Which statement is true of the nucleus of a cell