Answer:
Genetic variability refers to a species's genetic variation as a whole. Specific changes in DNA fragments or genes are referred to as genetic variants, and each mutation of a gene is referred to as an allele.
Explanation:
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Answer:
This is an example of directional selection.
Explanation:
Directional selection is a type of positive selection where the evolutionary fitness of one genotype is higher compared to the other ones, thereby favoring the selection of one particular phenotype and shifting allele frequencies towards the selected genotype. In a biological context, the directional selection increases the chances for surviving and for reproducing in those organisms that have the alleles favored by this type of selection. Thus, the directional selection produces the loss of genetic variability and leads to the fixation of the dominant alleles.
The wings are adapted so they can hover and feed off of flowers.
The beak and tong is modified to extract nectar from flowers with long flower corollas.
Answer: Option A) ecosystem
The term ecosystem describes all interacting species, such as moose, ticks, and wolves, as well as their surrounding environment of trees, vegetation, and climate.
Explanation:
Ecosystem is the interrelationship of living organisms (plants, animals and microorganisms) with their environment. Hence, ecosystem include biotic (living) components such as mouse or wolves and abiotic components (non-living) such as climate or soil structure.