Q: Answer the following question given this paragraph: Flatworms have a mesoderm cell layer and simple organ systems. They also show cephalization and bilateral symmetry. Q: What type of cell layer do flatworms have? A: | OPTIONS:
- epidermis
- cuticle
- endoderm
- mesoderm
A: mesoderm

Q: Answer the following question given this paragraph: Population density just represents the average number of individuals per unit of area or volume. Often, individuals in a population are not spread out evenly. Instead, they may live in clumps or some other pattern (see Figure below ). The pattern may reflect characteristics of the species or its environment. Population distribution describes how the individuals are distributed, or spread throughout their habitat. Q: How the individuals in a population are spread throughout their habitat is referred to as what? A: | OPTIONS:
- habitual distribution
- population habitation
- population spread
- population distribution
A: population distribution

Q: Answer the following question given this paragraph: Overview of Transcription. Transcription uses the sequence of bases in a strand of DNA to make a complementary strand of mRNA. Triplets are groups of three successive nucleotide bases in DNA. Codons are complementary groups of bases in mRNA. Q: What is the term for groups of three successive nucleotide bases in dna? A: | OPTIONS:
- triads
- tertiary bases
- triple play
- triplets
A: triplets

Q: Answer the following question given this paragraph: Q: With what does cytokinins act in concert to stimulate cell division and influence the pathway of differentiation? A: | OPTIONS:
- dna
- hormone
- ribosomes
- auxin
A: auxin