When a scientist conducts an investigation, which of the following is the first thing he or she should

Edgar is stranded on an island surrounded by an ocean of salt water. He is thirsty, but he knows that it is a bad idea to drink salt water. How could Edgar separate the salt out of the salt-water mixture? A. pour the mixture through a screen B.

Humans have 44 autosomes and 2 sex chromosomes. True False

Which best describes a scientific theory?

In the early 1700s Linnaeus came up with a new system of classification of living things that eventually replaced the one that had been used since Aristotle developed it in ancient Greece about 2000 years earlier.

Why is the flower described as a reproductive organ?

In 1986, Chernobyl, a nuclear facility, was the site of a major nuclear accident in what country?

When the rate of vibration of the vocal cords increases?

In a DNA molecule, which of the following forms a base pair with adenine? O A. Cytosine O B. Guanine O C. Thymine O D. Adenine

Wood lice are more active as they move from a dry area to a humid area. Which innate behavior are they displaying here?

During the early stages of embryo development, dolphins have gill pouches. What does this mean? a. Dolphins evolved from fish. b. Fish evolved from dolphins. c. Dolphin embryos go through a fish phase during development. d.