Line 1: *Sperm had to swim from male to female reproductive organs for fertilization. Male gametes are called sperm. Male gametes had to swim from male to female reproductive organs for fertilization.*
*(C)*
Line 2: *Why do male gametes swim from male to female reproductive organs?
Options:
- (A) temperature changes
- (B) to leave the egg
- (C) fertilization
- (D) competition
- (E) it needs them
- (F) to feed
- (G) permineralization
- (H) to heal themselves*

Logic of a solution: *Echinoderms lack respiratory and excretory systems. Lung mechanics and gas exchange are topics during study of the respiratory system. Echinoderms have no lungs.*
*(A)*
The original question: *What do echinoderms lack?
Options:
- (A) Lungs
- (B) Mass
- (C) oxygen
- (D) eardrum
- (E) gills
- (F) ovaries
- (G) Organs
- (H) Bodies*

Line 1: *Reproduction is the process by which organisms give rise to offspring. Seed refers to offspring, children. Organisms give rise to children by reproduction.*
*(B)*
Line 2: *How do organisms give rise to children?
Options:
- (A) mitosis
- (B) reproduction
- (C) reproductive isolation
- (D) Plants growth
- (E) it needs them
- (F) litter
- (G) by indirect light
- (H) replenishing*

Logic of a solution: *Echinoderms have a unique water vascular system with tube feet. Each starfish arm is lined with tube feet. Each starfish arm contains part of the water vascular system.*
*(D)*
The original question: *Where does a starfish have its water vascular system?
Options:
- (A) salt and water.
- (B) Chlorophyll
- (C) the environment
- (D) in its arms
- (E) on the rocks
- (F) in its eyes
- (G) Epidermis
- (H) in the ocean*

Line 1: *Glucose is used for energy by the cells of most organisms. Blood Sugar Glucose is sugar. Sugar is used for energy for the cells of most organisms.*
*(A)*
Line 2: *What is used for energy in most cells?
Options:
- (A) sugar
- (B) sodium
- (C) muscle
- (D) maples
- (E) calcium
- (F) food
- (G) silicon
- (H) Energy*

Line 1: *Sponges are a source of food for many species of fish. Fish and other marine animals abound here. Sponges are a source of food for many marine animals.*
*(C)*
Line 2:
*Marine animals find these to be a great source of food:
Options:
- (A) grain
- (B) nutrient
- (C) sponges
- (D) Energy.
- (E) sea vents
- (F) sodium
- (G) Energy
- (H) fungi*