Questions
1. Define environment.
2. Describe, in detail, the niche of human.
3. How is natural selection related to the concept of niche?
4. List five predators and their prey organism.
5. How is ecosystem different for a community?
6. Humans raising cattle for food is what kind of relationship?
7. Give examples of organisms that are herbivores, carnivores, and omnivores.
8. What are some different trophic levels in an ecosystem?
9. Describe the carbon cycle, the nitrogen cycle, and the phosphorus cycle.
10. Analyze an aquarium as an ecosystem. Identify the major abiotic and biotic factors. List members of the producer, primary consumer, secondary consumer, and decomposer trophic levels.
Answer
1. Define environment.
• The environment of an organism can be divided into living (biotic) and nonliving (abiotic).
- Living (biotic factors) of an organism’s environment include all forms of life with which it interacts.
- Nonliving (abiotic factors): energy, nonliving matter, and processes that involve the interactions of nonliving matter and energy.
2. Describe, in detail, the niche of human.
• Humans are the dominant organisms on Earth. Our niche is very broad and we interact in many ways with the organisms with which we share the planet. We can see that we have complicated interactions with other organism, and these interactions can be places into the same categories we use to describe relationships between nonhuman organisms. Human is a predator as we use animals as food. Humans are also relying on many kinds of plants as their primary source of food. Also many times, humans are raising the animals, feed the animals by using other sources found in nature such as plants or other animals as food to feed their live stocks. And humans are also plant the trees, or do farming. It is the concept that humans raise the animals or plants as a primary food source.
3. How is natural selection related to the concept of niche?
• Since the most the structural, physiological, and behavioral characteristics organisms display are determined by the genes they possess. As in the niche of an organism is the functional role it has in its surrounding. In the niche concept of the organisms is how it modifies its physical surrounding and how it is affect to the organism. So that is what it says in the natural selection. The species have to produce their next generation by passing the genes. And that genes which pass to the next generation has something to do with the niche of the organism which it has to adapt and to knows its surrounding and its profession.
4. List five predators and their prey organism.
• Lions eat zebra
• Wolves eat moose
• Toads eat flies
• Pelicans eat fish
• Snakes eat mouse
5. How is ecosystem different for a community?
• Two concepts that focus on relationships that involve many different kinds of interactions are community and ecosystem. A community is assemblage of all the interacting populations of different species of organisms in an area. Some species play minor roles, while others play major roles, but all are part of the community. Community consists of interacting populations of different species, but these species interact with their physical world as well. Ecosystem is defined space in which interactions take place between a community, with its entire complex interrelationship, and the physical environment. Many communities create an ecosystem of the Earth.
6. Humans raising cattle for food is what kind of relationship?
• A human is raising cattle for food is a Mutualism relationship.
7. Give examples of organisms that are herbivores, carnivores, and omnivores.
• Primary consumers also known as herbivores are animals that eat producers as a source of food such as leaf-eating insects, and seed-eating birds.
• Secondary consumers known as carnivores are animals that eat other animals such as eagles primarily eat fish, or lions primarily eat zebras.
• Omnivores are animals that eat both plants and other animals in their diet, such as bears, foxes, chickens. Etc.
8. What are some different trophic levels in an ecosystem?
• Each step in the flow of energy through an ecosystem is known as a tropic level. Producers (plants, algae, and phytoplankton) constitute the first trophic level.
• Herbivores constitute the second tropic level.
• Carnivores that eat herbivores constitute the third trophic level.
• Carnivores that eat other carnivores are the fourth trophic level.
9. Describe the carbon cycle, the nitrogen cycle, and the phosphorus cycle.
• Carbon Cycle: The carbon cycle includes the processes and pathways involved in capturing inorganic carbon-containing molecules, converting them into organic molecules that are used by organisms, and the ultimate release of inorganic carbon molecules back to the abiotic environment.
Nitrogen Cycle: involves the cycling of nitrogen atoms between the abiotic and biotic components and among the organisms in an ecosystem. Seventy-eight percent of the gas in the air we breathe is made up of molecules of nitrogen gas. However, the two nitrogen atoms are bound very tightly to each other, and very few organisms are able to use nitrogen in the form.
• Phosphorus Cycle: is different from the carbon and nitrogen cycles in one important respect. The ultimate source of phosphorus atoms is rock and release in nature by the erosion of rock and become dissolved in water. Plants use the dissolved phosphorus compounds to construct the molecules they need. Animal obtain the phosphorus they need when they consume plants or other animals. When the organism dies or excretes waste products, decomposer organisms recycle the phosphorus compound back into the soil.
10. Analyze an aquarium as an ecosystem. Identify the major abiotic and biotic factors. List members of the producer, primary consumer, secondary consumer, and decomposer trophic levels.
• Abiotic factors (nonliving) can be organized into several categories: energy, nonliving, matter, and process that involve the interactions on nonliving and energy.
• Biotic factors (living) of an organism’s environment include all forms of life and with which it interact.
- Producer: grass, algae, phytoplankton
- Primary consumer: grasshopper, larva, zooplankton
- Secondary consumer: rat, fish
- Decomposer: fungi, bacteria, insects, worms
Posts
No comments:
Post a Comment