4th 6 weeks Test

The greater a habitat’s biodiversity, the greater will be that habitat’s -

• sustainability over time with varying conditions.
• consumption of energy in the form of sunlight.
• temperature ranges across the seasons.
• distance to the nearest water source.

What is Ecological Succession?

• Competition between plants in a society
• A natural disaster such as a flood or fire
• The cycle of a tomato plant
• The change an ecosystem experiences over time

What type of succession is shown going from figure A to figure B?

• primary succession
• ecological succession
• secondary succession
• intermediate

All living things are biotic

• True 
• False

Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

Why does biodiversity contribute to a habitat’s sustainability?

• The more plants and animals in a habitat, the greater the biomass, which is how habitats store energy.
• The greater the number of species, the more competition there is for food between predators, which sustains their populations.
• CChanging conditions that harm one species leave other species to survive and perhaps even thrive.
• Landforms change shape less frequently when there is a greater number of species using the land.

• F
• G
• H
• J

Which internal structure is an adaptation that provided organisms with the function to perform gas exchange on land?

• Gills
• Lungs
• Hollow Bones
• Chambered Heart

What environmental condition is likely to increase the frequency of brightly colored and highly scented flowers in a species of plants over many generations?

• Increase in shade
• Heavy precipitation
• Higher soil nutrient levels
• Available insect pollinators

A Texas rancher wants to raise award winning "Texas Longhorns". He chooses a bull that has the desired traits of long horns and long legs. The rancher mates the bull with only cows that have the same traits. What is this practice called?

• natural selection
• selective breeding
• genetic resistance
• artificial selection