1. Given an atom with the Mass number of 40 and 22 neutrons, how many protons there are in the nucleus of this atom? How about electrons? How many electrons on the last shell? How many electrons, if any, does it need to comply with the octet rule? 2. What is the pH of a pure WATER solution if the concentration of H+ in water is 10-7 ?

3. Let’s assume you add acid to a solution containing a buffer. What is the buffer going to do (release or bind protons)? Hint: think about the definition of an acid & a buffer.

How do you transfer mrna into codons ? i'm so confused : (

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens