Ques:You are presented with the question "Which animal has a backbone?" and the following answer choices:  - camels  - snail  - bats  - cricket  - a fish  - bird  - koalas  - octopus  Now knowing that birds are endothermic tetrapod vertebrates and animals with backbones are called vertebrates, choose the best answer.

Ans:bird
-----
Ques:You are presented with the question "what is hormones controlling cell activities important to?" and the following answer choices:  - gravity  - it helps plants in growing  - the sun  - central theme of physiology  - female sex cells  - density  - Generating heat  - production of energy  Now knowing that hormones control many cell activities, so they are very important for homeostasis and homeostasis is the central theme of physiology, choose the best answer.

Ans:central theme of physiology
-----
Ques:You are presented with the question "What can be used for separating a solute from a solvent in a solution?" and the following answer choices:  - simple  - salinity  - tube  - energy  - heat  - boiling  - sweating  - mild  Now knowing that evaporation can be used for separating a solute from a solvent in a solution and boiling is evaporation that occurs theroughout a liquid, choose the best answer.

Ans:boiling
-----
Ques:You are presented with the question "what happens when animals and plants evolve to environmental conditions?" and the following answer choices:  - survival  - rapid expansion  - ascension  - extinction  - revolution  - adding heat  - Temperature changing  - specialization  Now knowing that specialization occurs when competing species evolve different adaptations and animals and plants evolve together, adapting to environmental conditions, choose the best answer.

Ans:
specialization
-----