Which option is the basic unit of water, a compound? A. A water atom
B. A hydrogen atom
C. A hydrogen molecule
D. A water molecule

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

This drawing shows a human body system. what is the primary function of this body system?

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons