[Q] What do sense organs help bullfrogs do?
Options:
- (A) excrete waste
- (B) empty gall bladder
- (C) An object is seen
- (D) Move to another area
- (E) Catch prey
- (F) protect them
- (G) smell and eat
- (H) smell and taste
[A] Here's my solution: Amphibians have sense organs to smell and taste chemicals. Bullfrogs eat other amphibians. Bullfrogs can smell and taste chemicals through sense organs. The answer is (H).

[Q] What can lead to the formation of multicellular embryo in venter?
Options:
- (A) Something that makes plants green
- (B) Something made from fermented ricce
- (C) A compound that donates proton
- (D) By wind and rain
- (E) reproduction
- (F) Fertilization of gametes
- (G) metabolic reaction
- (H) heat produced
[A] Here's my solution: Gametes then unite in fertilization and form a diploid zygote. Diploid zygote forms multicellular embryo in venter. Fertilization of gametes can lead to the formation of multicellular embryo in venter. The answer is (F).

[Q] What is an example of a tetrapod vertebrate that produces amniotic eggs.
Options:
- (A) animals
- (B) tortoises
- (C) crocodiles
- (D) barnacles
- (E) insects
- (F) parasites
- (G) Lizards
- (H) a fish
[A] Here's my solution: Reptiles are a class of tetrapod vertebrates that produce amniotic eggs. All lizards are reptiles. Lizards are tetrapod vertebrates that produce amniotic eggs. The answer is (G).

[Q] Which of the following has the most complex nervous system?
Options:
- (A) animals
- (B) nerves
- (C) fur seals
- (D) humans
- (E) elephants
- (F) Jellyfish
- (G) bears
- (H) kalenchoes
[A]
Here's my solution: Most invertebrates have a more complex nervous system. Jellyfish and insects are invertebrates. Jellyfish have a more complex nervous system. The answer is (F).