Logic of a solution: *Plants have specialized reproductive organs. Plant reproduction is similar to animal reproduction. Animals have specialized reproductive organs.*
*(A)*
The original question: *What is something that has specialized reproductive organs?
Options:
- (A) animals
- (B) insects
- (C) Conifers
- (D) burrs
- (E) potatoes
- (F) rabbit
- (G) sharks
- (H) ducks*

Line 1: *Zooplankton are tiny animals that feed on phytoplankton. Many zooplankton are crustaceans. Some crustaceans feed on phytoplankton.*
*(A)*
Line 2: *Some crustaceans feed on
Options:
- (A) phytoplankton
- (B) fungi
- (C) refraction of light
- (D) heat energy
- (E) an organism's body
- (F) carbon
- (G) algae
- (H) salt and water.*

Logic of a solution: *Echinoderms lack respiratory and excretory systems. Starfish and sea urchins are also echinoderms. Starfish lack respiratory and excretory systems.*
*(F)*
The original question: *What kind of animal doesn't have a respiratory or excretory system?
Options:
- (A) a fish
- (B) bears
- (C) ant
- (D) whale
- (E) humans
- (F) starfish
- (G) mammals
- (H) llama*

Line 1: *Most invertebrates have a nervous system. Invertebrates are animals without a backbone. Most animals without backbones have a nervous system.*
*(C)*
Line 2: *Which type of system do most animals without backbones have?
Options:
- (A) sensory neurons
- (B) Veins and arteries.
- (C) Nervous system
- (D) Stereo system
- (E) Root system
- (F) to move people
- (G) Skeletal system
- (H) insects*

Logic of a solution: *Many nucleotides bind together to form a chain called a polynucleotide. Nucleotides are the building blocks of DNA . The building blocks of DNA bind together to form a chain called a polynucleotide.*
*(D)*
The original question: *What do the building blocks of dna bind together to form?
Options:
- (A) A compound that donates proton
- (B) colors of the spectrum
- (C) Electrical energy
- (D) chain called a polynucleotide
- (E) Something with exactly eight protons
- (F) Something that makes plants green
- (G) Something with a head, thorax, and abdomen
- (H) biological diversity*

Logic of a solution: *Veins generally carry deoxygenated blood. Arteries and veins are blood vessels. Arteries carry blood.*
*(F)*
The original question:
*Arteries in the body are able to carry what?
Options:
- (A) saliva
- (B) breathe
- (C) water
- (D) Air
- (E) oxygen
- (F) blood
- (G) veins
- (H) liquid*