true or false 1. In general males of a species select females on the basis of th
ID: 100678 • Letter: T
Question
true or false
1. In general males of a species select females on the basis of their ability to produce offspring.
2. Parasites take advantage of their hosts, but limit the impact so that their host will survive for long periods
3. Survivorship curves can distinguish populations on the basis of changes in the probability
of dying in relation to age.
4. When communities are disturbed, the first changes are termed primary succession, followed by secondary succession.
5. Aquatic ecosystems are typically limited by primary productivity.
6. Changes in a habitat may cause it to become fragmented into smaller, more isolated regions. This is a risk because some animals require large ranges, or may face greater risks in habitats that are smaller.
7. Endemic species are those that are typically found in a given region.
8. Humans are a tertiary consumers because they eat animal tissues.
9. In many ecosystems, the abundance of a species may be determined by a species that feeds on it. This is an example of top-down control.
10. It takes about 10x more energy to grow a cow than to grow wheat.
11. Much of the energy that is available in a diet is lost to inefficiencies in the form of heat.
Explanation / Answer
1. False. In most species females choose males for mating.
2. True. Parasites depend on their host for nutrition and other resources, therefore they limit their imact , so that the survival of the host is increased.
3. True.Survivorship curves provide the graphical representation of the survival rate of individuals in different age groups.
4. False.Primary succession involves the creation of nutrient rich soil after an earthquake or volcanic eruption has occured.Secondary succesion occurs after incidents such that there is still organic matter available for the growth of plants.
5. True. Aquatic ecosystems are limited by primary productivity due to limited supply of light and nutrients.
6. True.Habitat fragmentation provides risk to organisms as it reduces the amount of habitat available to organisms.
7. True. Endemic species are those that are found in a particular geographical region.
8. False, Humans are secondary consumers because they consume primary consumers.
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