A measurement of a star's brightness is called

A biologist isolates a large, unidentified molecule from some cells in his lab. He determines that the macromolecule breaks into smaller pieces with the concomitant loss of water.

The ABO blood type system in humans demonstrates

Group 1 and group 2 elements became cation when they form ionic bonds because they lose one and two electrons respectively. true or false

Large groups of galaxy clusters that appear in sheet like and thread like shapes are known as

Which immunoglobulin mediates the type 1 hypersensitivity reaction involved in allergic rhinitis? iga ige igg igm?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.