1. What is a gene?(1 point) A. a structure that contains many chromosomes

B. a section of DNA that encodes a specific protein

C. a large molecule that performs a specific function

D. a point that joins two halves of a chromosome

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand