I need answer of the questions without an explanation just a letter. If my answe

Question

I need answer of the questions without an explanation just a letter. If my answer is right, don't mention it only for my wrong answer I circled

49. Selection against the most common form, favoring the most extreme variants is called: a. Allopatric speciation b. Disruptive selection c, Genetic drift (d. Stabilizing selection e. Directional selection 50. Mechanical isolation occurs when two species: Have different ecological niches a b. Have incompatible genitalia Have incompatible gametes c. d. Produce sterile offspring e. Don't produce at the same time

Explanation / Answer

49. Selection against common form favoring extreme phenotypes is known as disruptive selection. It is also known as diversifying selection in which the extreme phenotypes are favored by natural selection over intermediate phenotypes. The individuals at the upper and lower ends of the curve exhibit the higher fitness than the individuals at the middle of the curve. This is known as disruptive selection. Option b is correct.

50. Reproductive isolation could be a cause for two distinct populations to interbreed and still producing a fertile offspring. Reproductive isolation develops by different means like behavioral isolation, geographic isolation and temporal isolation. Two or more species living in a same habitat reproduce at different times is known as temporal isolation. Though the Leopard frogs and Tree frogs share a common habitat, the Leopard frogs mate in April and the Tree frogs mate in June. Due to different mating periods both these species are isolated by temporal isolation. Option e is correct.

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.