Logic of a solution: *Fish have a centralized nervous system with a brain. Sharks are a type of fish. Sharks have a centralized nervous system with a brain.*
*(D)*
The original question: *What has a centralized nervous system with a brain?
Options:
- (A) Man
- (B) Birds
- (C) leeches
- (D) shark
- (E) evergreens
- (F) salmon
- (G) worms
- (H) pan*
Line 1: *Viruses are not cells. Plant cells are surrounded by a cell membrane and a cell wall. Viruses do not have walls and membranes.*
*(C)*
Line 2: *What lacks walls and membranes?
Options:
- (A) deserts
- (B) flower cells
- (C) viruses
- (D) fungi
- (E) tree cells
- (F) bacteria
- (G) plant cells
- (H) alpacas*
Logic of a solution: *Flatworms belong to the phylum Platyhelminthes. Flatworms Flatworms or Platyhelminthes include flukes, tapeworms, and turbellarians. Tapeworms belong to the phylum Platyhelminthes.*
*(E)*
The original question: *What kind of worm belongs to the phylum platyhelminthes?
Options:
- (A) homogenous
- (B) moves
- (C) dangerous
- (D) insects
- (E) tapeworm
- (F) parasites
- (G) white
- (H) graptolites*
Line 1: *All plants have a characteristic life cycle that includes alternation of generations. Alternation of generations always includes a sexual phase alternating with an asexual phase. All plants have a characteristic life cycle that includes sexual and asexual reproduction.*
*(C)*
Line 2: *Plants have a life cycle which includes both sexual reproduction and what?
Options:
- (A) converting electricity to heat
- (B) arranged marriage
- (C) asexual reproduction
- (D) rapid expansion
- (E) biological diversity
- (F) singular
- (G) babies
- (H) produce offspring*
Logic of a solution: *Carbon may be stored in sedimentary rock for millions of years. Carbon is the fuel source. A fuel source may be stored in sedimentary rock for millions of years.*
*(E)*
The original question: *What may be stored in sedimentary rock for millions of years.
Options:
- (A) Sand castles
- (B) Chemical energy
- (C) heat energy
- (D) Millions of dollars.
- (E) A fuel source.
- (F) Energy.
- (G) In sediment
- (H) Stored animal fur.*
Logic of a solution: *Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Familiar types of gamete include the female ovum , or egg cell, and the male sperm cell. Fertilization occurs when the male and female gametes fuse to form a diploid zygote.*
*(B)*
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
*When gametes fuse, the resultant zygote is:
Options:
- (A) fertile
- (B) diploid
- (C) Flowers
- (D) grow
- (E) infected
- (F) It expands
- (G) pollen
- (H) seeds*