Answer:
all things are made of atoms
Explanation:
atoms are the building blocks of life you are made of atoms.
<span>Organs are formed by tissues combined together.
</span><span>♡♡Hope I helped!!! :)♡♡
</span>
Blood is constantly processed by some excretory organs even though it is not excreted by the excretory system.
Answer:
Changes in the environment affect the food sources available for birds. For example, if a flood was to occur, there would be an abundance of fish to birds to eat. So birds with bigger beaks will be able to eat fish, to live and reproduce offspring with bigger beaks. While birds with smaller beaks will not be able to catch fish to eat, therefore decreasing the population of birds with smaller beaks.
Answer:
dissolved oxygen
Explanation:
it is because every animal whether on land or water needs oxygen.
