which one is right? (Prezygotic barriers / Postzygotic barriers) are reproductive isolating mechanisms that occur after a zygote has been formed. An example would be (an infertile hybrid / gametes that cannot fuse).
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- Write the definition of the following terms: 1. Semelparous life history 2. Iterous species 3. Senescence 4. Antagonistic pleiotropy 5. Carrying capacityDescribe the difference between semelparity and iteroparity— two different reproductive strategies.A prezygotic barrier prevents (a) the union of egg and sperm (b) reproductive success by an interspecific hybrid (c) the development of the zygote into an embryo (d) allopolyploidy from occurring (e) changes in allometric growth
- The phenomenon of ____ results from the unequal size of the male and female gametes and the markedly different amounts of parental investment in the resulting offspring. As a result of this phenomenon, females tend to be the choosier sex in most vertebrate species. A. anisogamy B. isogamy C. isostacy D. pleiotropy E. heterogeneityIf a female of a monogamous social wasp species could help to produce more sisters with an r of 0.75, why would she ever reproduce personally, given that the relation of reproducers to their offspring is just 0.5? Don't write from any online source..Which of the following are post-zygotic reproductive barriers?a. Different mating songs prevent mate recognitionb. Species A breeds in Spring, Species B breeds in summerc. Species A and B mate, but the embryos die before hatchingd. The gametes of species A aren’t compatible with the gametes of species Be. Species A and B can mate and produce healthy offspring, but the offspring are infertile
- What determines whether a gamete is male or female? Explain why this difference predicts the two main forms of sexual selection.Which of the following statements describes an organism that is parthenogenic? An organism that reproduces without sex. An organism that is monoecious. An organism that produces offspring from eggs that have not been fertilized. An organism that starts as a female and develops into a male. A. 1, 2, & 3 B. 1 & 3 C. 2 & 4 D. 4 only E. all of 1, 2, 3 and 4EVOLUTION LINK Could hawthorn and apple maggot flies be considered an example of assortative mating, which was discussed in Chapter 19? Explain your answer.
- Which of the following IS TRUE about sexual dimorphism (choose all that apply)? Group of answer choices it refers to morphological differences between the sexes it refers to the principles of selecting reproductive partners No answer text provided. in represents a form of intraspecific variationLions and tigers are separate species. However, on rare occasions (especially in zoos) they have been known to mate and produce hybrid offspring (ligers & tigons!). Explain, with reference to the mechanisms of reproductive isolation, why they are separate species even though they can mate. (1-2 sentences) **Please answer in simple, easily understandable terms**What causes sexual dimorphism? Give some examples of sexually dimorphic species, and why you think that form of sexual dimorphism arose.