Answer:
<h2>genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles.</h2>
Some spicules are formed of the mineralized substances calcium carbonate and silica, while others are made of an organic substance called spongin. Sponginskeletons<span> were and are used as scrubbers in bathtubs, though they are fairly expensive. The ubiquitous bathtub accessory called a lufa is NOT a </span>sponge<span>, but a plant.</span>
For question one
There are 13 levels of organization. In sequence, they are represented as atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms, population, community, ecosystem, biome, and biosphere. Atom: It is the most basic and fundamental unit of matter.
B I'm pretty sure hope this helps
