Hey. The first sound is the "lub." This is what you hear once the mitral and tricuspid valves of the heart close, which are the valves between the atria and the ventricles! Super cool. It is your third answer choice.
According to this theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust<span>.</span>
Answer:
Nucleic Acids
Explanation:
Between carbohydrates, lipids, proteins, and nucleic acids, DNA and RNA molecules most accurately fall under the macromolecular category of nucleic acids.
ExampleS of how conditions on Earth would worsen if greenhouse gases increase.
- Increase Surface Temperautre
- Heats The Oceans
- Melts Polar Ice
Hope This Helps!
The correct answer is B - homozygous
