Answer:
Early land animals had both lungs AND gills, and their bodies consisted of few hard parts. Meaning they lacked things like an exoskeleton for instance. Animals today have either lungs OR gills and many have protecting hard parts of their bodies.
Explanation:
Answer:
there is a good chance the population of mice will die off or the mice will migrate to a new area.
Explanation:
with there being so many mice and limited food mice will beging to die from starvation. mice might also migrated to a new area to find new food. this could cause competition for food in that new area too.
Answer:
C. An organism must copy its DNA to pass genetic information to its offspring
Explanation:
Without the copying of the DNA life would not continue as existing organisms would not be able to reproduce and replace themselves.
Well theory isnt proven. It means you have a strong idea about the subject your talking about. So if a scientist finds evidence that suggests something against the theory then it can be changed.
Active transport is the process that would be used to transport calcium ions through the calcium pump.
