Logic of a solution: *Biodiversity increases the productivity and stability of ecosystems. Marine ecosystems also act as stabilizers of global systems especially our climate. Biodiversity increases the productivity and stability of the entire global system.*
*(E)*
The original question: *What increases the productivity and stability of the entire global system?
Options:
- (A) important habitats
- (B) Plants growth
- (C) solar system
- (D) animals
- (E) biodiversity
- (F) environment
- (G) bottlenecks
- (H) power stations*

Line 1: *All animals are heterotrophs. All consumers are also called Heterotrophs. All animals are consumers.*
*(A)*
Line 2: *All animals are what?
Options:
- (A) consumers
- (B) all matter
- (C) insects
- (D) aquatic
- (E) plants
- (F) furry
- (G) parasites
- (H) infected*

Logic of a solution: *Most arthropods are insects. Flies are insects with two wings. Flies are arthropods with two wings.*
*(B)*
The original question: *What is an arthopod with two wings?
Options:
- (A) rare
- (B) fly
- (C) two
- (D) host
- (E) Aves
- (F) male
- (G) bird
- (H) bats*

Line 1: *Cells are the basic units of the structure and function of living things. Osteogenic cell types are indicated. Osteogenic is a type of the basic units of the structure and function of living things.*
*(B)*
Line 2: *What is a type of the basic units of the structure and function of living things?
Options:
- (A) sensory neurons
- (B) osteogenic
- (C) animals
- (D) Chemical energy
- (E) Energy
- (F) trees
- (G) ferns
- (H) fur and fat*

Logic of a solution: *Sweating reduces body heat. Sweat cools the body by evaporation, which removes heat from the body surface. Sweating cools the body by evaporation.*
*(E)*
The original question: *How does sweating cool the body?
Options:
- (A) Riding a bike
- (B) all liquids
- (C) layers of fat
- (D) staying warm
- (E) evaporation
- (F) Animal survival
- (G) matter vibrating
- (H) hydration*

Logic of a solution: *Electron transport is the final stage of aerobic respiration. Aerobic respiration occurs only in the presence of oxygen. Electron transport occurs only in the presence of oxygen.*
*(D)*
The original question:
*Electron transport requires which of the following?
Options:
- (A) electron microscope
- (B) sodium
- (C) Energy.
- (D) Oxygen
- (E) fission
- (F) warmth
- (G) flagellum
- (H) Energy*