Answer:
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Explanation:
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<span>they have mutuality relationship</span>
The correct answer is option A
The major advantage of DDT at that time when it was used as a pesticide is that the DDT was very effective as a pesticide and it killed almost all the pests on which it was sprayed. It killed all the insect and pests that was present in the united states at that time. It later became harmful and entered into the food web.
Establishing just one tree species can impair soil fertility and prevent other species from being established.
We can arrive at this answer because:
- Ecological succession is the term that refers to the establishment and development of plant species in areas that were devastated until that area presents a large vegetative population when it reaches climax.
- During the establishment of ecological succession, the must be a great diversity of plants, allowing for harmony and balance between the species and the environment.
- When ecological succession is done with only one species, this balance is impaired, as well as ecological succession.
This is because a single tree species can hide soil fertility and make it unsuitable for planting any other species. In addition, the genetic unity among plants makes it easier to develop pests and diseases that can devastate the region.
More information:
brainly.com/question/23025906?referrer=searchResults
The answer to the question B which is the principle of dominance. Say the genotype of plant 1 is TT(tall, homozygous) and plant 2 is tt(short, homozygous). <span>T is dominant over t.
Crossing the two plants, we end with genotypes that all show Tt.
Since T is dominant it will show between the two, resulting in all tall plants.</span>
