Scientist think that many species have one common ancestor. Which answer choice best tells why scientists think this way?

Group of answer choices

homologous structures

all of the answer choices

the fossil record

vestigial structures

A laboratory procedure calls for making 600.0mL of a 1.1M KNO3 solution. How much KNO3 in grams is needed?

Which is defined as moles of solute per liter of solution? a. Molarity b. Formality c. Density d. Molality e. Normality

Which statement best describes the basis of the band theory of metallic bonding?

How can you make gravity go away?

What characterizes a chemical change?

What is the definition of convection a. the process in which energy is released by molecules breaking apart b. the process in which energy is released by molecules breaking apart c. transfer of heat between two objects that are touching d.

Describe how space exploration has changed the economy and culture, and include one specific example.

If a sample containing 2.50 ml of nitroglycerin (density=1.592g/ml) is detonated, how many total moles of gas are produced?

A 5.00g of X, the product of organic synthesis is obtained in a 1.0 dm3 aqueous solution. Calculate the mass of X that can be extracted from the aqueous solution by a 50cm3 of ethoxy ethane. (KD (X) = 40.

2. Why are stain used when preparing observing cells under the