Hypothesis that can be tested through experimentation?

What happens to the unused embryos in in - vitro fertilization? is that right? what is the difference between that and abortion?

Almost all the South American and Central American Indians have Rh-positive, type O blood. Note that there is no significant biological advantage to this blood type. Which mechanism best explains these facts

What is the unifying molecule of cellular respiration in breakdown of lipids, carbohydrates, and proteins?

Which element is the basis for the macromolecules found in living things?

Which of the following is NOT an interpretation that can be made from an age structure diagram? the rate of change in population size the distribution of age the comparative sizes of the male and female populations the effect of a natural disaster

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.