Affiliate Marketing Secrets

2. The stable ecosystem that develops due to succession _____.
(1 point)
is called a niche
is always a forest
is called a climax community
never changes
Figure 3-6
3. Look at the graph in Figure 3-6. Approximately how many hours of sunlight should these plants receive each day in order to make them grow at their optimum level?
(1 point)
4
12
16
20
4. Water temperature and light are two ____________________ factors that affect the tolerance range of organisms in a lake.
(1 point)
5. Tropical rain forest and ____________________ biomes are both characterized by a thin layer of nutrient-poor topsoil that can support only shallow-rooted plants.
(1 point)
6. Fires, natural disasters, and human intervention are possible causes of ____________________.

A biologist places a single, living sponge in a saltwater tank. After several weeks, the biologist observes other small sponges living in the tank. Because the biologist is certain that no other sponge was introduced into the tank, what other explanation could you provide to explain the observation?
Describe the body of a leech. In what way do the leech’s adaptations make it suited for its niche?
When natural disasters strike natural areas, often the only animals to survive are the insects. Explain why this might happen.
PS, this is not my homework or anything, I need to study for a test i have in class tomorrow. So can someone plz help me? these are the only ones i cant figure out! D: