bone marrow <span>contains hematopoietic stem cells, which give rise to the three classes of blood cells that are found in the circulation: white blood cells (leukocytes), red blood cells (erythrocytes), and platelets (thrombocytes)</span>
Answer:
A.messages that are sent from the brain to body parts
Answer:
b
Explanation: the server serves for an entire game until they switch to the opponents serving.
Answer:
Robert Rescorla
Explanation:
Robert Rescorla is one of the experimental psychologists most important of our time; one of his works, the Rescorla - Wagner model, is one of the theoretical models that more has influenced research in learning psychology
in the last times.
An individual's finances can affect the means by which they can do physical activiry, which in turn affects their ability to keep physically fit.
If, for example, an individual has a small amount of finances to their name, they may not be able to access specialized equipment that would normally be found in places such as gyms (which require a paid membership most of the time).
In short: There's only so much one can do for free and without any kind of fitness equipment.
