Experiments simulating the conditions of early Earth  suggest which of the following could have been a precursor to  the cyanobacteria that produced the oxygen that eventually filled Earth’s atmosphere?

A chicken egg is a large cell that is visible to our bare eyes and it contains water, protein, carbohydrates, and lipid.  In an experiment, a chicken egg has its hard shell removed but it’s semi-permeable inner membrane remains intact.  The egg weighs 90 grams.  The egg is placed in a glass of corn syrup.  It sits in the corn syrup for 8 hours.  After 8 hours, the egg is removed from the corn syrup and weighed.  It now weighs 70 grams.  Which of the following is an accurate statement.

Select all of  the answers that are correct from the following.  Which of these are types of passive transport?

Select the incorrect association.  (Choose all that apply)

The graph shows an increase in the number of species of pesticide-resistant insects from 1900 to 2000. What is the best title for this graph?

Draw the atomic structure of a fictional atom that has an atomic number of 3 and an atomic mass of 7. Make sure you label all particles and it is clear how many of each are present. Upload your drawing in a doc, docx, or pdf file.   Describe how the atom is more likely to achieve stability (ionic vs covalent bond)

Factor out the greatest common factor.  

Factor the trinomial completely.  

Factor the expression.  

Find the GCF of ,   and .