the middle of metaphase I
<span>Osteoclasts
</span><span>Are derived from stem cells that produce macrophages
Secrete acids and protein-digesting enzymes</span>
Light is a form of EM radiation.
EM radiation has no mass (it's just energy packets called photons).
EM radiation can travel through a vacuum. (The speed of light in a vacuum is called c and is around 300,000 m/s).
Hope this helps!
<span>The amniote egg is a water proof structure composed of a shell, embryonic membranes, and the living embryo. </span>
