7. The hybrids between tetraploid and diploid plants of the same ancestral speci

Question

7. The hybrids between tetraploid and diploid plants of the same ancestral species are usually sterile. A) B) C) D) E) are triploid. have chromosomes that usually synapse incorrectly during meiosis. Both b and c All of the above 8. Which of the following is the correct way to write the species and genus? A) Homo sapien B) Homo sapicn C) homo sapien D) Homo sapien barrier? Which of the following is not a prezygotic reproductive isolating A) Behavioral isolation B) Mechanical isolation C) Hybrid infertility D) Temporal isolation E) None of the above 9. 10. The biological species concept does not apply to which groups of organisms? A) Birds B) Organisms in which males and females form monogamous pair bonds C) Organisms that reproduce asexually D) Organisms that engage in sexual reproduction E) Insects 11. Geographical speciation is also known as A) reinforcement. B) sympatric speciation. C) Darwinian speciation. D) the biological species concept E) allopatric speciation. 12. Which of the following choices is the conventional representation for the name of a sea star common to the rocky intertidal zone? A) Pisaster Ochraceous B) Pisaster Ochraceous C) Pisaster ochraceous D) pisaster ochraceous E) pisaster ochraceous

Explanation / Answer

Answer for question number 7 : The correct answer is D (Both B and C)

Explanation : An individual with a tetraploid chromosome compliment produce sterile offspring if it is crossed with diplod individual.

Answer for question number 8 : The correct answer is D (Homo sapien). Homo sapien is the zoological name of human beings. Humans belongs to kingdom: animalia, Phylum : Chordata, Class: Mammalia, and order : Primates.

Answer for question number 9 : The correct answer is C (Hybrid infertility)

Explanation : Hybrid infertility is a post zygotic isolation mechanism . Post zygotic isolation mechanisms are those which prevent the growth of hybrid individuals after fertilisation has occurred or which reduce the fertility or viability of the F1 hybrids. They are caused by the following methods such as, gametic mortality, zygotic mortality, hybrid inviability, F2 breakdown etc.,

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