Answer:
B) sugars; leaf; apical meristem
Explanation:
Phloem is one of the vascular tissues and is mainly involved in the transport of sugars. Phloem sap is the aqueous solution that moves through sieve tubes of phloem. Phloem sap mainly consists of sugars but also carries amino acids, hormones, and minerals. Sucrose is the most prevalent sugar.
Phloem sap moves from sites of sugar production (called sugar sources) to sites of sugar use or storage (called sugar sinks). A sugar sink is an organ that either uses the sugars for energy production and other functions or stores it.
In late spring, the fully grown leaves serve as a source of sugars. Apical meristem is responsible for the growth of stem and root length and serves as a sugar source as it obtains sugars from the leaves and uses them during the growth of shoot and roots.
Answer:
Mayflies are often seen as a sign of healthy water ecosystems because they are very sensitive to pollutants., Because mayflies are an indicator of water quality. Mayflies are highly sensitive to algal blooms, increased nutrient concentrations, and pesticides.
Environmental factors are more likely to affect phenotype than genotype.
Phenotype refers to the observable physical characteristics of an organism, a product of the genetic information contained in the genotype, in accordance with the conditions of the determined environment in which the organism lives.
- The phenotype supposes the manifestation of the genotype based on the environmental factors, the traits expressed by the phenotype are behavioral and physical.
- Regardless of the genotypic information manifested, environmental factors will also shape the phenotype of an organism, since it can suffer accidents, changes or adaptations that a genetically similar individual but in another environment would not suffer.
Therefore, we can conclude that the phenotype is the variable expression of a genotype in accordance with the environmental factors.
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