Life Science Quiz

1. What is the primary function of cells in living organisms?

To provide rigid structure
To convert food into energy
To store genetic information only
To produce waste products

2. What is the relationship between plant photosynthesis and animal respiration?

Plants and animals both produce oxygen
Plants and animals both produce carbon dioxide
They have no relationship with each other
Animals produce CO2 that plants use, and plants produce oxygen that animals use

3. In the Punnet Square below, if "B" represents a dominant gene for brown eyes and "b" represents a recessive gene for blue eyes, what percentage of offspring will have brown eyes?

	B	b
B	BB	Bb
b	Bb	bb

25%
50%
75%
100%

4. Look at the chart below showing oxygen and carbon dioxide levels in a closed environment with plants and animals. What can you infer about what happened at point X?

All the plants died
All the animals died
The lights were turned on, increasing photosynthesis
More plants were added to the environment

5. How many chromosomes do humans typically receive from each parent?

22
23
44
46

6. The graph below shows a population of moths with different wing colors over time. Based on this data, what can you infer about what happened in the environment at point Y?

The environment became cleaner, with less pollution
A disease affected only light-colored moths
Environmental pollution increased, giving dark moths a survival advantage
A new predator that only hunts dark moths was introduced

7. What is a mutation as described in the chapter?

A mistake in the process of coding DNA
A change in species due to human intervention
The normal process of genetic inheritance
The deliberate modification of genes

8. How is natural selection described in the chapter?

A fast process of deliberate breeding
A process where humans select desirable traits
A very slow process where the environment determines what traits help a species survive
The process of mutations appearing in a population

9. What combination of sex chromosomes results in a biological female?

XX
XY
YY
X

10. What is an ecosystem as described in the chapter?

A collection of only plant species in an area
Living things that share space where energy is cycled through different organisms
The internal environment of a single cell
A relationship between only two species