question: What is a diploid zygote the result of?
Options:
- (A) photosynthesis
- (B) Plant reproduction
- (C) diploid sperm and egg
- (D) mate with females
- (E) Leptospirosis
- (F) haploid sperm and egg
- (G) triploid sperm and egg
- (H) two haploid eggs
answer: Gametes then unite in fertilization and form a diploid zygote. Gametes are haploid egg or sperm that fuse to form a zygote. Diploid zygotes are the result of a haploid sperm and egg combining.
The answer is (F)

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
answer: 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.
The answer is (E)

question: Organisms in which class have beaks that are generally adapted for the food they eat?
Options:
- (A) apples
- (B) Mammalia
- (C) koalas
- (D) voles
- (E) Agnatha
- (F) Aves
- (G) Reptilia
- (H) edible
answer: Bird beaks are generally adapted for the food they eat. All birds are placed in the Class Aves. Organisms in the class Aves have beaks that are generally adapted for the food they eat.
The answer is (F)

question: Antigens are molecules that prompt the what of antibodies?
Options:
- (A) termination
- (B) failure
- (C) humans
- (D) decrease
- (E) production
- (F) anemia
- (G) rapid expansion
- (H) kinetic
answer:
Antigens are molecules that the immune system recognizes as foreign to the body. Antigens prompt the body to produce antibodies. Antigens are molecules that prompt the production of antibodies.
The answer is (E)