When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls.
The correct answer would be A.) Urinary Bladder
Answer:Astronomers use a number of telescopes sensitive to different parts of the electromagnetic radiations to study objects in space
Explanation:
Answer: 3
Explanation:
All elements in group 3 have 3 levels of energy.
Na (sodium) has 3 valences the inner has 2 electrons, the middle has 8 electrons and the outer has 1 electron.
This will continue across the group 3 adding one more electron to the outer valence until Ar (argon).
Remember the Octet rule of 8..?
