Answer:
While skeletal muscles are arranged in regular, parallel bundles, cardiac muscle connects at branching, irregular angles, called intercalated discs. Striated muscle contracts and relaxes in short, intense bursts, whereas smooth muscle sustains longer or even near-permanent contractions.
The correct answer for the question "A student looks at a slice of tissue on an unlabelled microscope slide. the student concludes that the tissue is not from an animal because the cells in t<span>he tissue have" is D. Cell walls. When we compare animal and plant cells, only plant cells have cell walls. Cell walls are formed because of cellulose. </span>
Explanation:
2) E) ribosome .
3) c) cytoskeleton: The cytoskeleton is a series of fibers made from proteins. It provides structure to the cell and gives it its shape it its shape.
4) a) chloroplast
A controlled variable is not changed throughout an experiment. It is there so that the other variables being tested on can be better understood.
