Question

Review the picture below.

A photo showing small plants sprouting from a cooled lava rock field.

Which would be the most accurate title for this picture?
primary succession after a controlled fire
primary succession after a volcanic eruption
secondary succession after a controlled fire
secondary succession after a volcanic eruption

Which statement about water best illustrates the property of adhesion?
water droplet found on a spider web in the morning
water molecules in a drop of dew
water is necessary for animal respiration
water dissolving salt into a solution
A mountain lion population recently experienced a drop in population size. Which of the following would best describe the limiting factor that is involved?
A change occurred in the genetic variability.
The deer population experienced a rapid decline due to a parasite.
Mountain lion hunting experienced an increase in restrictions.
The population of Trichinella, a parasite, experienced a decline.
Which best describes what is occurring in this population of squirrels?

Number of Squirrels Entering and Leaving a Population after 1 Year
Cause of change
Number of squirrels
Died from predation
2
Born
4
Immigration
10
Left to find food
3
Died from disease
8
Left to find a mate
3
Population growth is decreasing.
Population growth is increasing.
Population growth stays the same.
Population reaches carrying capacity.
Which best describes how an organism’s niche is determined?
An organism's habitat and inherited traits determine its niche by influencing how it interacts with the environment and other organisms.
An organism’s reproductive rate and population size determine its niche in an ecosystem.
An organism's physical size and strength determine its niche by helping it dominate other species.
An organism's location and prey determine its nice, regardless of its behaviors or traits.

Answer 1

1) primary succession after a volcanic eruption
- Bare cooled lava with new plants = primary succession on newly formed rock.

2) water droplet found on a spider web in the morning
- Droplet sticking to a spider web shows adhesion (water attracted to another surface).

3) The deer population experienced a rapid decline due to a parasite.
- Loss of prey is a limiting (biotic) factor that would reduce mountain lion numbers.

4) Population growth is decreasing.
- Net change = +4 (born) +10 (immigration) −2 −8 (deaths) −3 −3 (emigration) = −2 (decline).

5) An organism's habitat and inherited traits determine its niche by influencing how it interacts with the environment and other organisms.