Answer: Blank 1: Nucleus Blank 2: Organelles
<span>c. skeletal muscle contractions that are planned and conducted to increase muscle mass
</span><span>Skeletal muscle contraction is one immediate effect of exercise on the muscular system. Other effects include higher blood flow to muscles and increased muscle temperature, Regular exercise increases bone width and density, strengthens muscles, tendons, and ligaments. It also increases flexibility at joints. Exercise also leads to bigger muscles, improved muscle endurance, and more stable joints</span>
<h2>Bacterial chromosome
</h2>
The DNA of most bacteria is contained in a single circular molecule, called the bacterial chromosome. The chromosome, along with several proteins and RNA molecules, forms an irregularly shaped structure called the nucleoid. This sits in the cytoplasm of the bacterial cell
I'm thinking possibly d but I'm only a teen and I'm not sure
