Answer:
A biologist discovered a young, four-legged animal. The animal had lungs, seemed to fertilize internally, and its outer surface was covered with scales. In which class of animals is the biologist likely to place the animal?
reptile
Answer:
the Hubble space telescope
Explanation:
30) is B bec it goin from a low to high concentration every time that happens it requiers ATP.
31)B bec think of a enzyme as a key and a lock only one key will work with one lock and not others. So you see B and the black shape on top of it fits perfectly with. B . Another shape would not. So if it was a different shape the enzyme would not recognize it. The key would not fit the lock.
32) is A it pointing arrows out of the cell so everthing need to go out cell A has more insde then out so think ATP as a force pushing it out. And B there more in then out so it can move out easily:
The respiratory system and the circulatory system function together as a “coupled unit” delivering the body's oxygen and nutrients and taking away carbon dioxide and wastes to maintain homeostasis.
