Logic of a solution: *Prokaryotes are single-celled organisms that lack a nucleus. An organism is a living thing. Prokaryotes are single celled living things that lack a nucleus.*
*(F)*
The original question: *Prokaryotes are single celled living things in the animal kingdom that don't have a what?
Options:
- (A) epidermal
- (B) genus
- (C) complex
- (D) extinction
- (E) food
- (F) nucleus
- (G) properties
- (H) alleles*
Line 1: *Blood pH may become unbalanced if the rate of breathing is too fast or too slow. Slow and fast respirations or long periods without a breath are common in the dying child. Blood pH may become unbalanced if respiration is too fast or too slow.*
*(E)*
Line 2: *What is affected by too fast or slow respirations?
Options:
- (A) perspiration
- (B) breathing
- (C) heat energy
- (D) animals
- (E) blood pH
- (F) Most plants
- (G) hyperventilating
- (H) sweating*
Logic of a solution: *Heterotrophs are living things that cannot make their own food. All animals are heterotrophic and obtain their food from plants. Animals obtain their food from plants and cannot make their own food.*
*(E)*
The original question: *What obtain their food from plants and cannot make their own food?
Options:
- (A) bacteria
- (B) Flowers
- (C) trees
- (D) lichen
- (E) animals
- (F) fungi
- (G) humans
- (H) grass*
Line 1: *Organisms cluster around hydrothermal vents in the ocean floor. Hydrothermal vents are fissures in the ocean floor that leak hot, acidic water. Organisms cluster around fissures in the ocean floor that leak hot, acidic water.*
*(D)*
Line 2: *Where do organisms cluster on the ocean floor?
Options:
- (A) neutralized water
- (B) where they used to live
- (C) hot alkaline water
- (D) fissures of hot, acidic water
- (E) sedimentary rocks
- (F) fissures blasting cold water
- (G) at or near the margins
- (H) an area swollen with pus*
Logic of a solution: *Female gametophytes produce eggs inside the ovaries of flowers. Ovum, or eggs, are stored in the ovaries. Female gametophytes produce eggs inside where ovum, or eggs, are stored of flowers.*
*(H)*
The original question: *Female gametophytes produce eggs inside what part of flowers?
Options:
- (A) Petal.
- (B) an area swollen with pus
- (C) allow growth
- (D) at or near the margins
- (E) Produce department.
- (F) Chlorophyll
- (G) Chicken.
- (H) Where ovum, are stored*
Logic of a solution: *Urine is the liquid waste product of the body that is excreted by the urinary system. Mammals excrete urea in the watery form of urine . Urea is a waste product of the body that is excreted by the urinary system.*
*(E)*
The original question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
*What is a waste product of the body that is excreted by the urinary system?
Options:
- (A) potash
- (B) food
- (C) CO 2
- (D) sugar
- (E) urea
- (F) liquid
- (G) H 2 O
- (H) sulfur*