b)1 unicellular- means one cell
10. mouth
11. salivary glands
12. esophagus
13. stomach
14. small intestine
15. large intestine
Answer: this is called passive transport and it does not require energy.
The answer is: Freckles on the skin
Cold-blooded animals have a higher rate of secondary productivity because their bodies can preserve energy, especially during the hibernation period. W<span>arm-blooded animals, on the contrary, releases more energy in a cold environment. This makes them hunt for more food to gain sufficient biomass and heat.</span>