Observing our galaxy at radio wavelengths allows us to see through the dust in the disk that obscures our view.

Stars in the _______________ region of the Milky Way galaxy are all old, having a very low proportion of heavy elements.

Why do virtually all the galaxies in the universe appear to be moving away from our own?

__________________  ________________ (two words) look like flat white disks with yellowish bulges at their centers. The disks are filled with cool gas and dust, interspersed with hotter ionized gas, and usually display beautiful spiral arms.

X-ray images of the Sun generally show the

CRISPR RNAs (crRNAs) are transcribed by bacterial cells, but do not immediately begin being translated, like most other bacterial genes. Compared to normal bacterial mRNA, what would crRNAs lack that prevent them from being translated?

What does the term genetic equivalence mean, and what is its relevance to plant cells?

A planet’s size can be determined by observing its transit across a star.

Figure 26-2 The NephronUse Figure 26-2 to answer the following questions 20-24:What process occurs at the structure labeled “1”?

The cavity of the kidney that receives urine from the Major calyces is called the