CLEP Biology Exam Prep 2026
Practice Test

The following statements about the adaptation of animals to colder climates are all true, except:

Given the different habitats in aquatic ecosystems, identify the main groups of algae based on their predominant pigmentation and structure. Algae Type Pigmentation Structure Green Algae Chlorophyll Varied forms, from unicellular to multicellular Red Algae Phycoerythrin Mostly multicellular Brown Algae Fucoxanthin Predominantly large and multicellular

Which of the following characteristics might be observed in a tundra biome? Characteristic Description i Extremely low temperatures ii High biodiversity iii Permafrost present iv High precipitation v Short growing seasons vi Dense tree cover

In a population of plants, a trait such as flower color can be influenced by environmental conditions. What kind of genetic trait is this considered to be?

In a population of wildflowers, the color of the petals is determined by a simple recessive genetic trait. Based on this trait, which generalization about the genetic appearance of flower color is most likely to be true?

Which of the following is the most accurate example of migration behavior?

In a Bb x Bb cross involving two heterozygous rabbits, what are the genotypes of the offspring in terms of coat color?

In a population of mice, some individuals have brown fur, while others have white fur. A mouse with brown fur and a mouse with white fur possess different __________ of the same gene responsible for fur color.

For a study in an aquatic ecosystem, identify which of the following are examples of density-independent factors affecting fish populations: Statement i. Introduction of a new fish predator in the ecosystem ii. Toxic chemicals spilled into the water iii. Hurricanes causing widespread habitat destruction iv. Seasonal temperature changes leading to water stratification v. Increased competition for nesting sites

Consider the following components as factors influencing the process of natural selection in a population: Component Description i. Variation in traits Differences in traits among individuals ii. Selective pressure Environmental factors that affect survival iii. Genetic mutations Changes in DNA sequence iv. Reproductive success Ability to produce offspring v. Gene inheritance Passing genes to the next generation Which of these components are essential for natural selection to occur?

Evaluate the table below to identify which factors contribute to increased biodiversity within an ecosystem. Factor Description Effect on Biodiversity Natural selection Adaptive traits become more prevalent Neutral Gene flow Movement of genes between populations Increase Overharvesting Excessive removal of species Decrease Mutation Random changes in DNA Increase

The marine biome is characterized by an abundance of which animals?

Which component of the cell contains the enzymes needed for the Calvin cycle? Cell Component Function Chloroplast stroma Site of Calvin cycle Thylakoid membrane Site of light-dependent reactions Cytosol Site of glycolysis Nucleus Stores genetic material Mitochondrial matrix Site of Krebs cycle

What is the main structural difference between the plasma membrane of an animal cell and the cell wall of a fungal cell?

During glycolysis, what occurs to glucose at the start of the pathway?

During the process of transcription, which statement correctly describes the relationship between the primary molecular components involved?

Which of the following best describes the concept of enzymatic specificity?

What is the primary role of codons found in mRNA during protein synthesis?

Where would you expect to find cilia on a cell?

Identify which of the following conditions can lead to a permanent change in the DNA sequence of a bacterial cell. i. High levels of UV radiation ii. Mutagenic chemicals interacting with the DNA iii. Normal bacterial cell division iv. Oxidative stress within the cell

Biologist Contribution Field of Study Watson and Crick DNA structure Genetics Gregor Mendel Laws of inheritance Heredity Charles Darwin Theory of evolution Natural selection Rosalind Franklin X-ray diffraction DNA research Based on the table above, which contribution by Rosalind Franklin was crucial in the study of DNA, complementing Watson and Crick's model?

In flowering plants, from which tissues does a fruit typically develop?

Refer to the table below and identify which nutrients are essential for animals to obtain from their diet. Nutrient Requirement for Animals Source Proteins Essential Diet Carbohydrates Non-essential Generated by digestion Vitamins Essential Diet Cholesterol Non-essential Synthesized by liver Minerals Essential Diet

In mammals, what primarily regulates the circadian rhythm, often referred to as the biological clock?

What passes through the gastroesophageal sphincter?

In mammals, how does sperm reach the egg during fertilization?

Which organisms can be classified as contributing significantly to the ecosystem's nutrient cycling through decomposition? Organism Type Function in Ecosystem Fungi Decomposes organic material Bacteria Breaks down organic material Plants Produce oxygen and food Predators Control prey population

Examine the table below to identify which structures are part of the central nervous system and involved in processing sensory information. Structure System Function Cerebrum Central nervous system Sensory/motor processing Medulla oblongata Central nervous system Autonomic functions Olfactory lobes Central nervous system Smell processing Optic nerves Peripheral nervous system Vision transmission Cerebellum Central nervous system Balance and coordination

When you twist your ankle, which type of tissue is primarily affected?

Examine the life cycle of angiosperms below. Which process results in the formation of fruit? Process Description Pollination Transfer of pollen from anther to stigma Fertilization Sperm nucleus fuses with egg to form zygote Fruit Formation Ovary matures into a fruit Seed Development Zygote develops into an embryo within a seed