BIOL 103 FINAL EXAM

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Question 1 (2 points)
Which statement about evolution is FALSE?
Question 1 options:
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
better-adapted. 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 (2 points)
Negatively charged particles are found where in an atom?
Question 2 options:
In the nucleus

2. In a single layer outside the
nucleus
In multiple layers outside the
nucleus
Both inside and outside the
nucleus
Question 3 (2 points)
Which characteristic of water protects fish when a lake freezes?
Question 3 options:
cohesion
water is less dense as a
solid
water as a solvent
all of the above
Question 4 (2 points)
You have a solution that has a pH of 8 and need it to be pH 5. What do you do?
Question 4 options:

3. Add water
Add a base
Add an acid
Add a buffer
Question 5 (2 points)
What characteristic of carbon makes it a good backbone for creating diverse and durable
molecules?
Question 5 options:
Carbon is a large atom.
Carbon forms four covalent
bonds.
Carbon forms hydrogen bonds.
All of the above
Question 6 (2 points)
Which of the following structures can be found together in eukaryotic cells?
Question 6 options:

4. cytoplasm and ribosomes
cytoplasm and plasma membrane
DNA and ribosomes
ribosomes and endoplasmic
reticulum
Question 7 (2 points)
Which of the following reactions or pathways is catabolic?
Question 7 options:
Converting glucose to carbon dioxide and water (cellular respiration).
Making starch from many glucose molecules.
Photosynthesis: which builds glucose from carbon dioxide using energy
from light.
Making ATP from ADP and Phosphate.
Question 8 (2 points)
In a metabolic pathway, a typical control mechanism is to have: ________
Question 8 options:

5. the final product inhibit 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 9 (2 points)
Mitosis results in ______ cells and meiosis results in _______ cells.
Question 9 options:
haploid, diploid
diploid, haploid
diploid, diploid
haploid, haploid
Question 10 (2 points)
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.
Question 10 options:

6. YYSS, YYss, yySS, yyss
YS, yS, YS, yS
Yy, SS, YY, Ss
YYSS, YySS, YYSs,
YySs
Question 11 (2 points)
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 11 options:
100
75
50
25
Question 12 (2 points)
One of the products of cellular respiration is ________.
Question 12 options:

7. water
sucrose
cellulose
oxygen
Question 13 (2 points)
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.
Question 13 options:
niche
biome
community
population
Question 14 (2 points)
The temperature optimum for an enzyme is 37C. What will most likely happen if you
increase the temperature from 37C to 50C?
Question 14 options:

8. The enzyme activity will not be
affected
The enzyme activity will increase
The enzyme activity will decrease
The pH will increase
Question 15 (2 points)
When celery is placed in a glass of pure water the solution inside its cells is _____ compared
to the water.
Question 15 options:
selectively
permeable
isotonic
hypertonic
hypotonic
Question 16 (2 points)
An ecosystem can be characterized as:

9. Question 16 options:
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 17 (2 points)
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?
Question 17 options:
deer
coyotes
snake
grasses
Question 18 (2 points)

10. Carbohydrates are not
Question 18 options:
stored potential energy
made mostly of nitrogen and
carbon.
broken down by cellular
respiration.
made by producers.
Question 19 (2 points)
A primary consumer would eat:
Question 19 options:
secondary
consumers
plants.
Bacteria.
rabbits.

11. Question 20 (2 points)
Diffusion is
Question 20 options:
1. One type of active transport
1. The movement of water across the cell membrane
1. The movement of molecules from an area of high concentration to an area of
low concentration
1. The movement of molecules from an area of high concentration to an area of
low concentration
Question 21 (2 points)
Any individual organism has the potential to adapt to its environment, if it is given enough
time and possesses a mechanism to generate variation.
Question 21 options:
True
False
Question 22 (2 points)
Humans are more likely to be infected by viruses after the viruses had a chance to multiply
outside the body on surfaces touched by infected people.
Question 22 options:
True
False

12. Question 23 (2 points)
Once an adaptation appears, it remains in all the descendants unless the species becomes
extinct
Question 23 options:
True
False