What is the structure of a cell

Form a Hypothesis: A scientist uses radioactive nitrogen to label the nitrogenous bases of the DNA of a cell. Then the DNA is allowed to replicate, and the new strands take up non-radioactive bases.

What system does kidney disease affect? A. circulatory system B. respiratory system C. excretory system D. nervous system

The most important factors in determining the rate of weathering are A) animal actions and oxygen B) abrasion and acids from plant roots C) carbon dioxide and acid rain D) rock type and climate

How would someone measure the effect of pH on the rate ofenzyme reaction?

1. protons no charge 2. neutrons positive charge 3. electrons negative charge

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.