Correct answer: A) Organisms gradually change the environment
Succession occurs when there is a disturbance in the environment, it would be a minor disturbance like a fire or a major disturbance like a volcanic eruption. Based on the disturbance, succession can be divided into two types:
1). Primary Succession: Primary succession is said to happen when a group of the species or a community evolve from a barren land or a land with no life. This land is fresh and does not have any life on it.
Example: Primary succession occurs after a volcanic eruption
2). Secondary Succession: The secondary succession is said to occur when there is a disturbance and it destroys ecosystem but still there is an availability of nutrient, seed, and soil.
Example: Forest Fire
Succession occurs because organisms gradually change the environment. (Option a.)
Succession is the process by which an ecosystem undergoes changes over time due to the influence of living organisms. It occurs because organisms gradually change the environment they inhabit. In ecological succession, there are two main types:
1. Primary Succession: This occurs in areas where no previous ecosystem existed, such as bare rock, volcanic lava, or newly formed sand dunes. Pioneer species, like lichens and mosses, are the first to colonize such areas. Over time, they break down the rock and create soil, making it possible for other plants and organisms to establish themselves. As the environment changes and becomes more hospitable, the community of species gradually changes, leading to a series of distinct stages until a stable climax community is reached.
2. Secondary Succession: This type of succession occurs in areas that have been disturbed or disrupted, but where soil and some remnants of the previous ecosystem remain. For example, after a forest fire or clear-cutting, the area will undergo secondary succession. Pioneer species, often grasses and shrubs, quickly establish themselves and create conditions for other species to colonize the area. As the ecosystem recovers, different stages of plant and animal communities succeed one another, eventually leading to a climax community that is relatively stable.
In both types of succession, organisms play a significant role in changing the environment, creating conditions that allow new species to establish and eventually leading to a more complex and diverse ecosystem.
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Likeanimals, plants must maintain an internal balance, or homeostasis. All theliving organisms must be able to maintain homeostasis in their environment andalso to themselves to avoid dysfunction in their bodily system and continue toadapt tp the dynamic surroundings.
Gradualism, a theory in both geology and biology, suggests that significant changes occur through slow, continuous processes over long periods of time. This contrasts with the concept of punctuated equilibrium, which describes long periods of stasis interrupted by rapid changes. Both gradualism and punctuated equilibrium are observed in the evolutionary process.
The theory that the student is referring to seems to be the concept of gradualism in the context of evolution and geology. Gradualism is the idea that substantial changes in species or the earth's geology can occur through slow, sustained processes over long periods of time. This runs in contrast to the concept of punctuated equilibrium, which describes long periods of stasis or no change, interrupted by rapid bursts brought on by drastic environmental changes.
Some ideas of gradualism were initially influenced by 18th-century geologists like James Hutton and later Charles Lyell, who proposed that geological change occurred slowly due to continuous small changes. These thoughts dramatically influenced Charles Darwin's evolutionary theories. Darwin adopted a gradualist approach in his understanding of evolution, proposing that given enough time, slow and subtle processes could produce significant biological changes within species.
However, both gradualism and punctuated equilibrium models are seen in practice, with evidence from the fossil record showing both long periods of slight, gradual change and shorter periods of rapid, significant change. In conclusion, evolution is not a linear process but a branching one and involves elements of both gradualism and punctuated equilibrium.
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B. bronchi
C. arteries
D. veins
Answer: Option A
Explanation:
The exchange of the oxygen and carbon dioxide takes place in the lungs. The oxygen from the lungs are exchanged by the carbon dioxide between the alveoli and capillaries.
The oxygen from the lungs are carried away to various cells of the body and the carbon dioxide from the body cells are carried to the lungs for the process of exchange of gases.
Test cross is the cross between an organism with unknown dominant genotype and an organism with known recessive genotype.
Since dominant trait results from a dominant allele, the test cross can determine if an unknown genotype is heterozygous and homozygous dominant.
If A is dominant allele, and a is recessive allele, then AA is dominant homozygote, Aa is a heterozygote, and aa is recessive homozygote.
According to the Punnett square, if all of the offspring are heterozygote (Aa), then unknown genotype is dominant homozygous (AA). If half of the offspring are the heterozygote, and the other half are recessive homozygote, then the unknown genotype is heterozygote (Aa).
Answer:
Conduct a test cross with a purebred recessive plant.
Explanation:
Verified after test was graded within ody ssey ware system as question # 10.
The questions wording: You have a plant with yellow seeds, which express a dominant phenotype. How would you determine the plant's genotype?
B. Predation allowed the Venus flytrap to outcompete other species because of its ability to move rapidly.
C. As consumers instead of producers, Venus flytraps have greater access to better nutrients.
D. Predation allowed the Venus flytrap to collect a wider variation of preformed organic materials.
E. Better nutrients allowed the Venus flytrap to grow faster than other plants.