BIOL 103 FINAL EXAMINATION

BIOL 103 FINAL EXAMINATION 

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BIOL 103 Final Examination 

Question 1 

Which statement about evolution is FALSE? 

Question 1 option: 

According to evolutionary theory, you are related to a bacterium, to a yeast cell, to a snake, and to a 

whale. In fact, you are related to every species now alive on Earth, and to fossil species like 

dinosaurs as well. 

Natural selection acts on genetic differences within a population to cause evolution. Individuals do 

not evolve. 

Natural selection is about slow but steady progress. Through it, populations constantly get betteradapted. 

When this process is completed for all populations, evolution will come to a stop. 

Evolution occurs constantly, without end; there is no endpoint in evolution. 

Question 2 

Negatively charged particles are found where in an atom? 

Question 2 options: 

In the nucleus 

In a single layer outside the nucleus 

In multiple layers outside the nucleus 

Both inside and outside the nucleus

Question 3 

You have a solution that has a pH of 8 and need it to be pH 5. What do you do? 


Add water 

Add a base 

Add an acid 

Add a buffer 

Question 4 

What characteristic of carbon makes it a good backbone for creating diverse and durable 

molecules? 


Carbon is a large atom. 

Carbon forms four covalent bonds. 

Carbon forms hydrogen bonds. 

All of the above 

Question 5 

Which of the following structures can be found together in eukaryotic cells?


cytoplasm and ribosomes 

cytoplasm and plasma membrane 

DNA and ribosomes 

ribosomes and endoplasmic reticulum 

Question 6 

Which of the following reactions or pathways is catabolic? 


Breaking down ATP into ADP and phosphate. 

Making starch from many glucose molecules. 

Photosynthesis: which builds glucose from carbon dioxide using energy from light. 

Making ATP from ADP and Phosphate. 

Question 7 

In a metabolic pathway, a typical control mechanism is to have: ________ 


the final product have no effect on the enzyme responsible for its own production. 

the final product inhibit an early step. 

a reactant inhibit a late step. 

a lack of reactant stimulate the pathway.

Question 8 

Mitosis results in ______ cells and meiosis results in _______ cells. 


haploid, diploid 

diploid, haploid 

diploid, diploid 

haploid, haploid 

Question 9 

In beans yellow (Y) is dominant to green (y) and smooth (S) is dominant to wrinkled (s). What are 

the possible genotypes for the offspring of the following cross: YySS and YYSs. 


YYSS, YYss, yySS, yyss 

YS, yS, YS, yS 

Yy, SS, YY, Ss 

YYSS, YySS, YYSs, YySs 

Question 10 

Red rose color is incompletely dominant over white rose color. If a red rose is crossed with a pink 

rose, what percentage of the offspring will be pink? 

Question 10 options:

100 

75 

50 

25 

Question 11 

One of the products of cellular respiration is ________. 


water 

sucrose 

cellulose 

oxygen 

Question 12 

An ecologist is studying all the animals, plants, fungi and bacteria, as well as the interaction among 

them, in a forest? He is studying the _________ in the forest. 


niche 

biome 

community 

population

Question 13 

The temperature optimum for an enzyme is 37C. What will most likely happen if you increase the 

temperature from 37C to 50C? 


The enzyme activity will not be affected 

The enzyme activity will increase 

The enzyme activity will decrease 

The pH will increase 

Question 14 

When celery is placed in a glass of pure water the solution inside its cells is _____ compared to the 

water. 


selectively permeable 

isotonic 

hypertonic 

hypotonic 

Question 15 

An ecosystem can be characterized as: 


populations + community. 

all species, population, and community interactions for organisms in a given area. 

the abiotic components of the environment. 

all of the biological interactions, plus interactions with the abiotic environment, in a given area. 

Question 16 

Enzymes 


catalyze reactions 

prevent reactions from occurring 

are found only in prokaryotes 

all of those answers are correct 

Question 17 

This term refers to the maintenance of internal stability in a creature: 


homeostasis 

mutualism 

parasitism 

meiosis

Question 18 

Steroids and waxes are 


proteins 

carbohydrates 

lipids 

nucleic acids 

Question 19 

Active transport DOES NOT require ATP 


True 

False 

Question 20 

In October of 2003, a raging wildfire swept through the mountain ecosystems in Southern California, 

burning everything in its path to the ground and driving away all of the animals. In order for the 

mountain ecosystem to re-establish itself, which member of the food web has to return first? 


deer 

coyotes 

snake

grasses 

Question 21 

Carbohydrates are not 


stored potential energy 

made mostly of nitrogen and carbon. 

broken down by cellular respiration. 

made by producers. 

Question 22 

A primary consumer would eat: 


secondary consumers 

plants. 

Bacteria. 

rabbits. 

Question 23 

Diffusion is


One type of active transport 

The movement of water across the cell membrane 

The movement of molecules from an area of low concentration to an area of high concentration 

The movement of molecules from an area of high concentration to an area of low concentration 

Question 24 

Any individual organism has the potential to adapt to its environment, if it is given enough time and 

possesses a mechanism to generate variation. 


True 

False 

Question 25 

Once an adaptation appears, it remains in all the descendants unless the species becomes extinct 


True 

False 

Question 26

When a founder population has a small gene pool, evolutionary change is more likely to be rapid 

than if the founder population has a large gene pool. 


True 

False 

Question 27 

When speciation occurs, the result is a huge dramatic change in the new species. 


True 

False 

Question 28 

When two groups are reproductively isolated, it can be reliably predicted that speciation will follow 

very soon. 


True 

False 

Question 29

Codons are locate on 


abiotic components 

DNA 

RNA 

all of those 

Question 30 

Fossil evidence suggests that human ancestors arose one time in Africa. 


True 

False 

Question 31 

Sunlight influences vitamin D production is humans. 


True 

False 

Question 32

Mitochondria and chloroplasts of eukaryotic cells are very similar to prokaryotes 


True 

False 

Question 33 

Organisms that live in habitats with high levels of competition are more likely to produce defensive 

chemicals than those that live with little competition. 


True 

False 

Question 34 

The human population may continue to increase even though it surpasses carrying capacity. 


True 

False 

Question 35 

A woman’s ovum will complete Meiosis II only, if fertilization has occurred.


True 

False 

Question 36 

One human disease is caused by a change in the DNA from GAA to GTA. This change is an 

example of: 


crossing over 

a mutation 

independent assortment 

cytokinesis 

Question 37 

The main function of a ribosome is to ____________________. 


extract energy from glucose 

synthesize glucose 

store food in the form of fat 

synthesize proteins

Question 38 

The effectiveness of a medication containing growth hormone is tested on a group of young male 

rabbits 3 weeks of age. The best control group would be: 


any group of rabbits 

a group of young male rabbits 3 weeks of age, not given the medication 

a group of young female rabbits 3 weeks of age, not given the medication 

no control is required; just measure whether the rabbits grew 

Question 39 

The number of _______________ in the outer shell of an atom determines the type of chemical 

bonds an atom can make. 


electrons 

protons 

ions 

neutrons 

Question 40 

You find a cell of a type you have never seen before. The cell has both a nucleus and a cell wall. 

Therefore, you conclude, it must be a _______________ cell. 


liver 

animal 

bacterial 

plant 

Question 41 

The gene pool of a population may change due to: 


migration 

genetic drift 

natural selection and mutation 

all of the above 

Question 42 

What are “keystone species” in a community? 

Question 43 

What is “pseudoscience”? 

Question 44

What are dependent variables? 

Question 45 

(Required) You have read that inorganic fertilizers contribute to water pollution and would like to 

make a switch from inorganic fertilizers to organic compost in your vegetable garden. A friend 

graciously gives you a truck load of his compost. As a good researcher and critical thinker you are 

not convinced that organic compost will yield better results than the inorganic fertilizer you have 

used for years with good results. To draw your own conclusion based on scientific evidence you 

decide to conduct an experiment in your garden. State a good hypothesis, design an experiment 

(include test subjects, sample size, control(s), dependent and independent variables, type of data 

collected) and hypothetical results/conclusion. Does your conclusion support the hypothesis? 

Question 46 

(Required) The habitat of one species of tropical fish is red coral reefs. The large majority of the 

fish in this population are red. A few individual fish carry a mutation that prevents the production of 

the red pigment; as a result these individual fish are white.The temperature of the ocean where 

these fish live gets warmer and warmer over a 10 year period, and as a result the coral is bleached 

and turns white. Use what you have learned about natural selection to explain how this bleaching 

event may have affected the evolution this fish population (not including possible direct effects of 

warmer temperatures on the fish). Use appropriate terminology about evolution in your answer, 

including the terms natural selection, adaptive trait, and reproductive success. 

Question 47 

Describe the major land biome where you live. How have human activities affected native species? 

Include specific examples. 

Question 48

You scoop up a water sample from a local pond nearby, because you are curious about the possible 

microbes that might live there. After looking at several slides that held drops of the sample, you 

noticed two different kinds of cells: One kind was very small and had no separate internal structures; 

the other kind was much larger, and it contained several kinds of internal structures that were 

physically different from each other. Please name each cell and briefly describe their similarities and 

difference

BIOL 103 FINAL EXAMINATION

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