Ques:[_ bind to allergens.
Options:
- (A) to stay warm
- (B) mammals
- (C) fur and fat
- (D) animals
- (E) protect them
- (F) Most plants
- (G) Antibodies
- (H) Chemical energy]
Ans:[Antibodies are large, Y-shaped proteins that recognize and bind to antigens. Allergens are also called Antigens. Antibodies bind to allergens.
(G)]

Ques:[What is larger than ponds?
Options:
- (A) rivers
- (B) deltas
- (C) H 2 O
- (D) loch
- (E) toads
- (F) drop
- (G) puddle
- (H) bird bath]
Ans:[Lakes are generally bigger and deeper than ponds. Scotland s lochs , including the famous Loch Ness, are glacial lakes. Lochs are bigger and deeper than ponds.
(D)]

Ques:[Members of what kingdom that shed their leaves seasonally each year are called deciduous.
Options:
- (A) Fungi
- (B) Winter
- (C) air cools
- (D) vegetation
- (E) Animalia
- (F) Protista
- (G) epidermal
- (H) Plantae]
Ans:[Plants that shed their leaves seasonally each year are called deciduous plants. All trees are in the Kingdom Plantae, the plants. Members of the kingdom Plantae that shed their leaves seasonally each year are called deciduous.
(H)]

Ques:[The total mass of organisms in an environmental stage is called what?
Options:
- (A) food pyramid
- (B) extinction
- (C) ecological pyramid
- (D) food chain
- (E) vegetation
- (F) food
- (G) ligt
- (H) biomass]
Ans:
[Biomass is the total mass of organisms at a trophic level. Each stage is a trophic level. Biomass is the total mass of organisms in an environmental stage.
(H)]