Answer:
observe the feeding behaviors of gulls
Explanation:
other three options are not biological ones
The first one is series circuit
The second one is parallel
Answer:
35%
Explanation:
Thymine and guanine are always equal, so it will be the same.
<span>formed in the atmosphere when chemicals, called volatile organic compounds (VOCs) and nitrogen dioxide (NO2) are acted upon by sunlight</span>
Answer:
Humus has a characteristic black or dark brown color and is an accumulation of organic carbon. Besides the three major soil horizons of (A) surface/topsoil, (B) subsoil, and (C) substratum, some soils have an organic horizon (O) on the very surface.