Answer:
An organism would need a 4 chambered heart.
Explanation:
The heart consists of 4 chambers in which blood flows freely. Right atrium, left atrium, left ventricle and right ventricle.
The pulmonary arteries carry de-oxygenated blood to the lungs from where CO2 is released and O2 is picked up during the process of respiration. The pulmonary vein then takes the oxygenated blood to the left atrium of the heart and then to the left ventricle of the heart.
Answer:
sweepstake route
Explanation:
From the view of the horses, the ocean barrier would be seen as a <u>sweepstake route</u>.
<em>By definition, the sweepstake route refers to a rather difficult or dangerous path through which animals can move from one place to another. No animal would take this path ordinarily except by pure chance or when events leave no other option.</em>
In the illustration, no horse would engage in an adventure of swimming across the ocean to North America until the European settlers decided to ferry them across. Hence, to the horses, the ocean barrier represents a sweepstake route.
Hydrogen is the exception to the octet rule
Carbon, oxygen and nitrogen always follow the rule
If you mean periodic table then it would be atomic number
