(question). What harms the respiratory and circulatory systems?
Options:
- (A) Greenhouse gasses
- (B) burning coal
- (C) inoculation
- (D) incinerated mercury
- (E) fossil fuels
- (F) water vapor
- (G) Sulfur dioxide
- (H) air
(answer). Air pollution harms the respiratory and circulatory systems. Incinerated mercury pollutes the air. Incinerated mercury harms the respiratory and circulatory systems.
The answer is (D)


(question). Plants are multicellular eukaryotes with what walls?
Options:
- (A) A solid geometric shape
- (B) preventing heat transfer
- (C) bone and skin
- (D) starch and bone
- (E) food and shelter
- (F) starch and protein
- (G) homogenous
- (H) starch and cellulose
(answer). Plants are multicellular eukaryotes with cell walls made of cellulose. For example, the walls of plant cells are made in large part of starch and cellulose . Plants are multicellular eukaryotes with starch and cellulose walls.
The answer is (H)


(question). Autotrophs make food from what?
Options:
- (A) Converting waste.
- (B) members of their own species
- (C) Chemical energy
- (D) photosynthesis
- (E) that material's properties
- (F) inorganic molecules
- (G) Organic compounds
- (H) Chlorophyll
(answer). Producers make food from inorganic molecules. Autotrophs are referred to as producers. Autotrophs make food from inorganic molecules.
The answer is (F)


(question). What passes energy up the food chain to adult vegans?
Options:
- (A) cows
- (B) animals
- (C) Batteries.
- (D) chickens
- (E) Power companies.
- (F) glucose
- (G) Humans.
- (H) Plants.
(answer).
Energy is passed up a food chain or web from lower to higher trophic levels. Plants represent the first trophic level. Energy is passed up a food chain from plants.
The answer is (H)