Answer:Osteoblasts work in teams to build bone.
Explanation:They produce new bone called "osteoid" which is made of bone collagen and other protein. ... They regulate passage of calcium into and out of the bone, and they respond to hormones by making special proteins that activate the osteoclasts. OSTEOCYTES are cells inside the bone.
A person with a cold can spread<span> the infection by coughing and/or sneezing. </span>Bacteria <span>or viruses </span>can<span> be passed on by touching or shaking hands with another person. Touching food with dirty hands will also allow viruses or </span>bacteria<span> from the intestine to </span><span>spread</span>
Answer:
migration, which is a response to an external stimulus
Explanation:
<u>The butterflies were migrating in response to external stimuli.</u>
Migration is the movement of organisms from one place to another in response to external stimuli. The stimuli could be for food, shelter, weather, etc.
<em>Flight in response to external stimuli is often due to the presence of danger as stimuli. The adrenal gland releases epinephrine which triggers physiological changes in the body and makes the organism decide whether to run, stay, or fight. </em>
In this case, the butterfly could have been migrating in response to the availability of flower nectars or pollen which serve as food for them. Once flowers are available during the spring, the butterflies come around and when the winter comes and the flowers disappear, they migrate away.
Answer:
Subsidence
Explanation:
subsidence is a process where cold temperatures in the polar regions cause air to descend to create high pressure it's basically the difference in temperatures that make the pressure so high because hot atoms expand and becomes less dense and rise while cold air contracts and becomes more dense and falls. hope this helps
