Table of Contents
- 1 Where do organisms get resources to provide their needs?
- 2 How do all the organisms in an ecosystem get the resources they need to release energy?
- 3 Which types of organisms must be present in an ecosystem if the ecosystem is to be maintained?
- 4 How does an ecosystem support living organisms?
- 5 When organisms attempt to use a resource in the same place at the same time?
- 6 How do organisms compete for resources?
- 7 How is gene flow related to the formation of new species?
- 8 How are genes exchanged between plants and animals?
Where do organisms get resources to provide their needs?
C. 1 All animals need food in order to live and grow. They obtain their food from plants or from other animals. Plants need water and light to live and grow.
How do all the organisms in an ecosystem get the resources they need to release energy?
All ecosystems require energy from an external source – this is usually the sun. Plants need sunlight to photosynthesise and produce glucose, providing an energy source for other organisms. (Plants are producers – they make sugar through photosynthesis – they use sunlight, water and carbon dioxide to produce food.)
What happens when an organism fights for the same resources in the environment?
Interspecific competition is when different animals that live in the same geographic area (sympatric species) compete for the same set of resources, mostly food and space. This occurs when a species’ survival or reproduction is suppressed because of the presence of a staunch competitor.
What are organisms attempts to use the same resources?
Competition occurs when organisms attempt to use the same RESOURCES. TRUE. Competition between members of the same species is known as INTERSPECIFIC competition.
Which types of organisms must be present in an ecosystem if the ecosystem is to be maintained?
Ecology and Human Impact
| Question | Answer |
|---|---|
| 8. Which two types of organism must be present in an ecosystem if the ecosystem is to be maintained (producers, carnivores, decomposers, herbivores). | Producers and decomposer |
How does an ecosystem support living organisms?
An organism will only live in an ecosystem that provides it with all its basic needs. Food: Although plants can make their own food using sunlight, animals need to eat other organisms to survive. Air: Plants need the carbon dioxide in the air in order to make food and animals need oxygen to breathe.
When an organism fights with another organism over a limited resource it is called?
Competition occurs when organisms strive for limited resources. Competition can be for food, water, light, or space. This interaction can be between organisms of the same species (intraspecific) or between organisms of different species (interspecific).
In which interaction does one organism defend resources from another organism?
Competition is an interaction between organisms or species in which both the organisms are harmed. Limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.
When organisms attempt to use a resource in the same place at the same time?
Competition occurs when organisms of the same or different species attempt to use an ecological resource in the same place at the same time.
How do organisms compete for resources?
Competition will occur between organisms in an ecosystem when their niches overlap, they both try to use the same resource and the resource is in short supply. Animals compete for food, water and space to live. Plants compete for light, water, minerals and root space.
Which is the most important resource for an organism?
Biological. In biology and ecology a resource is defined as a substance that is required by a living organism for normal growth, maintenance, and reproduction (see biological resource ). The main essential resources for animals are food, water, and territory. For plants, key resources include sunlight, nutrients, water, and a place to grow.
Why is reproduction important in the formation of new species?
Only heritable traits can evolve. Therefore, reproduction plays a paramount role for genetic change to take root in a population or species. In short, organisms must be able to reproduce with each other to pass new traits to offspring.
A geographically continuous population has a gene pool that is relatively homogeneous. Gene flow, the movement of alleles across the range of the species, is relatively free because individuals can move and then mate with individuals in their new location.
How are genes exchanged between plants and animals?
By YourDictionary. Gene flow is the exchange of genes between two separate populations. This is most often accomplished when animals or spores from plants migrate to a new area. Any time a gene is introduced into a population where that gene once did not exist, gene flow has occurred.