How is the alignment of chromosomes, shown in Figure 9-4, on the equatorial plate of the cell maintained?

What are two reasons for why a species might disappear from the fossil record?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Consider the equation s + o2 ? so2. what is the product? question 3 options: s so 2 s + so 2 o 2