Answer:
e) directional selection
Explanation:
Directional Selection:
- The type of natural selection that favors one of the extremes of the phenotype spectrum, shifting the allele frequency to one direction
- This type of selection selects against intermediate and one of the extreme phenotypes.
- In this particular case, the increasing pollution has pushed the plants to evolve better acid tolerance.
- This indicates that if the environmental conditions worsen, only the acid tolerant plants will be able to survive.
* Another example is illustrated in the image. The graph shows the shifts in allele frequency.
Answer:
They have some prokaryotic cells though they are being regarded as eukaryotes.
Explanation:
Cells are the basic functional unit of life
Eukaryotic cells have membrane bound nucleus while prokaryotic cells don’t have this.
The body of the tiger consists of different types of cells such as nerve cells, muscle cells, olfactory cells, digestive cells etc. An aggregation of these cells is what makes up the different types of systems ( digestive system, nervous system).
Though animals and human beings are widely regarded as eukaryotic they still possess some cells in the body which are prokaryotic. These prokaryotic cell include cilia which line the respiratory system.
Hardy-Weinberg Principle
Genotype frequency equation
Where p² is the freq of homo dominant genotype, 2pq is the freq of heterozygous genotype and q² is the freq of homo recessive genotype.
Allele frequency equation
p + q = 1
Where p is the frequency of dominant alleles and q is the frequency of recessive alleles.
Yellow eyes in the frog offspring is a phenotype (physical trait) that would be a expressed by a geneotype (YY or Yy). This frequency, 0.85 includes: p² + 2pq
0.85 + q² = 1
q² = 0.15
p = 
Then p + 
= 1
1 - = p
p = 0.613
61%
Basic building block to all living organisms
have cell walls
