ACT Science Test 5

Front

What does the bottom of a graph showing %O2 vs. time represent?

Back

Millions of years MA.

Front

What statement is consistent with the findings in Population A regarding pigment production?

Back

Both green-stemmed plants and purple-stemmed plants produce a pigment that can be used for photosynthesis.

Front

What does the right side of a graph showing %O2 vs. time represent?

Back

Number of known Paleo wildfires.

Front

What type of passage is characterized by visual data representation?

Back

Charts and graphs.

Front

If 2 purple-stemmed plants produce 52 purple-stemmed and 15 green-stemmed offspring, which student's explanation is best supported?

Back

Student 3.

Front

Define photosynthesis.

Back

The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

Front

What is the significance of the %O2 in ecological studies?

Back

It indicates the level of oxygen in the atmosphere, which is crucial for understanding historical climate conditions.

Front

Explain the concept of genetic variation in populations.

Back

Genetic variation refers to the diversity in gene frequencies within a population, which can affect traits and survival.

Front

What is the role of pigments in plants?

Back

Pigments absorb light energy for photosynthesis, allowing plants to convert sunlight into chemical energy.

Front

What does a graph depicting the number of known Paleo wildfires indicate?

Back

It shows the historical frequency of wildfires over millions of years.