Answer: (B) Pre-zygotic; post-zygotic.
Explanation:
Prezygotic isolation occurs before fertilization of eggs. It occurs between the two sex gametes and deter sexual reproduction between different species.
However, individuals are considered to be diverge on the phylogeny tree and different species, when they cannot reproduce.
Mechanisms of prezygotic isolation include habitat isolation, gamete isolation, mechanical isolation, behavioral isolation, and mating seasons.
Whereas, postzygotic isolation prevents the formation of fertile offspring. This phenomenon leads to production of an hybrid offspring from different species and this is a form of speciation in nature.
Mechanisms of postzygotic isolation include hybrid inviability, hybrid breakdown, and hybrid sterility.
Answer:
hey...im not sure about the answer but i think it is the 2nd option which is: rocks buried deeply and melted by intrusion rock erodedaway and deposited in ocea n base
hope it helps
Answer:
The correct answer will be-
3'- T U U C G C T T G U C G C T C C T G U U G -5'.
Explanation:
The formation of the mRNA from the template strand or anti-sense strand is known as the transcription.
The nucleotide in the mRNA is added in the same way as the DNA according to the Chargaff rules which states that A will bind to T and G will bind to C but instead of adenine in mRNA will add uracil.
On the basis of this, the mRNA strand will be-
template strand: 5' A T T G C G A A C T G C G A G G A C T T C- 3'
mRNA strand: 3'- T U U C G C T T G U C G C T C C T G U U G-5'.
The answer is; B
Mutations change the order of nucleotide and therefore affects codons that code for proteins. A different protein is thus produced from the wild type hence creating variations. Genetic shuffling in sexual reproduction, also called gene recombination occurs during meiosis and also when different organisms exchange genetic material such as in bacteria.
What is cell specialization?
Answer: cell specialization is an adaptation to do a particular job in a cell
