Typically, nitrogen atoms are composed of seven electrons, seven protons, and seven
neutrons. an isotope of nitrogen could
a. be negatively charged.
b. have more than seven electrons and more than seven protons.
c. have more than seven protons.
d. have more than seven neutrons.

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Name the organs of humanelemintary canal.

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an