Biology Semester 1 review

Pam tested how fertilizers with different concentrations of nitrogen affected the growth of a species of grass. She grew 4 groups of the same species of grass. All 4 groups were grown inside, with 10 hours of sun light each day, for 7 days. The results are shown in the table. What is the control

• the amount of light over 7 days

• the group without any fertilizer

• the average height of plant after 7 days

• the type of grass grown

Ladybugs prey on aphids. An ecologist puts a population of ladybugs and a population of aphids into a terrarium. She wants to study how a change to one population affects the other population. She lets the community develop over time, then introduces a chemical that makes aphids sterile. The graph shows the changes to the ladybug and aphid populations over time.

• the size of the ladybug population

• the length of time

• the size of the aphid population

• the amount of sterilizing chemical

What goes in Box 5 of the food web?

• scavengers

• decomposers

• carnivores

• herbivores

This is an energy pyramid of a desert ecosystem. Which food web accurately represents the ecosystem in the pyramid?

• 
• 
• 
• 

What would happen if the population of the bird species shown in the ecosystem in Figure 4-1 were to suddenly decrease?

• The grass and fish would compete for resources

• The fish population would increase

• The grass population would increase

• The fish would occupy the bird's niche

Which of the following conclusions could you draw about the cell shown?

• The cell is prokaryotic because it has a nucleus

• The cell is eukaryotic because it has a nucleus

• The cell is eukaryotic because it does not have a nucleus

• The cell is prokaryotic because it does not have a nucleus

Which structure in this cell modifies, sorts and packages proteins and other materials for storage or release from the cell?

• structure A, golgi apparatus

• structure B mitochondria

• structure C, smooth ER

• structure D, nucleus

What means of particle transport is shown?

• exocytosis

• endocytosis

• protein pump

• facilitated diffusion