Answer:
A pair of nephridia is present on each segment of the earthworm, They are similar to flame cells in that they have tubules with cilia and function like a kidney to remove wastes.
Explanation:
Answer: (B) Archaebacteria
Explanation: Archaebacteria, like all prokaryotes, have no membrane bound organelles. This means that the archaebacteria are without nuclei, mitochondria, endoplasmic reticula, lysosomes, Golgi complexes, or chloroplasts. Because<u> these organisms have no nucleus</u>, the genetic material floats freely in the cytoplasm.
Answer:
The frequency of both homozygous and heterozygous dominant species will start reducing and the frequency of homozygous recessive species will start increasing
Explanation:
Given-
Initial frequency of recessive allele is
Since there is no migration and no selection the population follows Hardy's Weinberg's equilibrium.
Thus , the frequency of dominant allele as per Hardy Weinberg's equation would be -
Humans enter this ecosystem and selectively hunt individuals showing the dominant trait. This means that they would be killing both homozygous and heterozygous dominant species.
Therefore, the frequency of both homozygous and heterozygous dominant species will start reducing and the frequency of homozygous recessive species will start increasing.
Answer:
The correct option is B: 2
Explanation:
Before meiosis takes place, the entire genetic material within the cell is replicated, this results in 2 copies of the 2n DNA. Since the person is heterozygous for the mutated allele, there is one copy of it present within one 2n set of chromosomes. Two of the 2n chromosomal sets means there would be two copies of it present in total and when the segregation event happens to create haploid cells, two of the cells will inherit the mutated copy.
Hope that answers the question, have a great day!
Answer:
Evolution is not a random process. The genetic variation on which natural selection acts may occur randomly, but natural selection itself is not random at all. The survival and reproductive success of an individual is directly related to the ways its inherited traits function in the context of its local environment.
Explanation: Hope this helps!